ci: use PR's HEAD in guix workflow

[UdjinM6]

Issue being fixed or feature implemented

Our guix workflow creates a merge commit instead of using HEAD from a PR itself which is why commit hash is different. That's exactly what is described in actions/checkout#27 imo.

related: #5355 (comment)

What was done?

adjust guix workflow

How Has This Been Tested?

see this PR results: the HEAD looks correct now
this PR: https://github.com/dashpay/dash/actions/runs/5191152453/jobs/9358590629?pr=5416#step:2:482
#5355: https://github.com/dashpay/dash/actions/runs/5187698039/jobs/9350381761?pr=5355#step:2:489

Breaking Changes

n/a hopefully

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated relevant unit/integration/functional/e2e tests
• I have made corresponding changes to the documentation
• I have assigned this pull request to a milestone (for repository code-owners and collaborators only)

[PastaPastaPasta]

utACK for squash merge

[kwvg]

utACK

[UdjinM6]

$ sha256sum guix-build-$(git rev-parse --short=12 HEAD)/distsrc-*/src/dashd{,.exe}
91664fe0a7bf0d8b232888d7f7b7ceaf3c2535f265e8aba195f10d92d03f1197  guix-build-508b8a4fd1c9/distsrc-508b8a4fd1c9-aarch64-linux-gnu/src/dashd
2e9f8435f12e7f5d9cb8cfda307fbc8201e3d65d725d4eb4a1f36cb890de8e43  guix-build-508b8a4fd1c9/distsrc-508b8a4fd1c9-arm-linux-gnueabihf/src/dashd
42231798b143ed36445818179b358560cf27832e5df57d7e5f85c67077367e86  guix-build-508b8a4fd1c9/distsrc-508b8a4fd1c9-riscv64-linux-gnu/src/dashd
df27321522055f9a7ce9f796f24b2ebbcc27b47c3c33d79a5a0d0ef5758d4ea6  guix-build-508b8a4fd1c9/distsrc-508b8a4fd1c9-x86_64-apple-darwin18/src/dashd
f5fe1876fd08d735f803be457a59f746b64c6fb4aaedd9b3f3f668734a3a9a1e  guix-build-508b8a4fd1c9/distsrc-508b8a4fd1c9-x86_64-linux-gnu/src/dashd
1bd814ee1d3d387b8a5311e375199bcbac5fdc356e72918257da85b247ed8af3  guix-build-508b8a4fd1c9/distsrc-508b8a4fd1c9-x86_64-w64-mingw32/src/dashd.exe

$ sha256sum guix-build-$(git rev-parse --short=12 HEAD)/distsrc-*/src/qt/dash-qt{,.exe}
f4c3fd68a4bb3408ea1ae2928546ea0559ea5f99351769e16853e741b967b14e  guix-build-508b8a4fd1c9/distsrc-508b8a4fd1c9-aarch64-linux-gnu/src/qt/dash-qt
5b70dbaff89178a4f0394864934616676a6af1bcaa97c6772fedcf3de7331d89  guix-build-508b8a4fd1c9/distsrc-508b8a4fd1c9-arm-linux-gnueabihf/src/qt/dash-qt
c91d312d59cbed290af5ec5a3424c16c4d13460e7f1eb16eaa7498e095645a55  guix-build-508b8a4fd1c9/distsrc-508b8a4fd1c9-riscv64-linux-gnu/src/qt/dash-qt
997960274c041602fc6a467bcd1799e2adde09aff783dd2d77b61c486c8c20b3  guix-build-508b8a4fd1c9/distsrc-508b8a4fd1c9-x86_64-apple-darwin18/src/qt/dash-qt
2c5d9e9c20e0375aecd44013629617007616c65897d0dbe1bd6ca2b2681ee5fc  guix-build-508b8a4fd1c9/distsrc-508b8a4fd1c9-x86_64-linux-gnu/src/qt/dash-qt
6bebed6b412e1b2ad5bf66e551e696623f5fc14e7423083635708e601887635b  guix-build-508b8a4fd1c9/distsrc-508b8a4fd1c9-x86_64-w64-mingw32/src/qt/dash-qt.exe

$ find guix-build-"$(git rev-parse --short=12 HEAD)"/output -type f | grep -v SHA256 | xargs sha256sum | sort -k 2
8fa1bdb642d58fe1a7758e75f3466af4377683e7fb1f89262c40473929db28d3  guix-build-508b8a4fd1c9/output/aarch64-linux-gnu/dashcore-508b8a4fd1c9-aarch64-linux-gnu-debug.tar.gz
2c83f0976511e5dabf8c899558b63789c9cc69a4ff1e4c13e87ad0edf2160d8c  guix-build-508b8a4fd1c9/output/aarch64-linux-gnu/dashcore-508b8a4fd1c9-aarch64-linux-gnu.tar.gz
41a12165bab2233d5211f2d92602f151c25ed1211f54ae3fbb55c8c7901baae8  guix-build-508b8a4fd1c9/output/arm-linux-gnueabihf/dashcore-508b8a4fd1c9-arm-linux-gnueabihf-debug.tar.gz
1e8bc3841c30d24cd5b65a24d3be2410c30648a2d15dcff284dc135114ba0b59  guix-build-508b8a4fd1c9/output/arm-linux-gnueabihf/dashcore-508b8a4fd1c9-arm-linux-gnueabihf.tar.gz
546570030b759f58dd1659c10453c4b41b9004915c109560f13d869b25ec4452  guix-build-508b8a4fd1c9/output/dist-archive/dashcore-508b8a4fd1c9.tar.gz
777f0f94d04462a459bdbfcea22aa8f425b03cde3f07ec14fb4cdd98b053600a  guix-build-508b8a4fd1c9/output/riscv64-linux-gnu/dashcore-508b8a4fd1c9-riscv64-linux-gnu-debug.tar.gz
2cfa95617e6ca8d190fdb0d17b003c7439f440db33d03971fe3df423b652e239  guix-build-508b8a4fd1c9/output/riscv64-linux-gnu/dashcore-508b8a4fd1c9-riscv64-linux-gnu.tar.gz
911bc02d0d64999171eb37f476603cdc4ccafc78dc789dadc04ca8d6a1edd172  guix-build-508b8a4fd1c9/output/x86_64-apple-darwin18/dashcore-508b8a4fd1c9-osx64.tar.gz
5c31c2036a82c4e9c40dad22117e2e4adae90028de7742d289d09687b40378fd  guix-build-508b8a4fd1c9/output/x86_64-apple-darwin18/dashcore-508b8a4fd1c9-osx-unsigned.dmg
f3d328c84e40f5ebd4d56d9a69c33d9c4e818bf15c06062f66d675ba29d98196  guix-build-508b8a4fd1c9/output/x86_64-apple-darwin18/dashcore-508b8a4fd1c9-osx-unsigned.tar.gz
37d84b394d633a959adcb75635976634294a2f22c54696284af21f3ca9ab776b  guix-build-508b8a4fd1c9/output/x86_64-linux-gnu/dashcore-508b8a4fd1c9-x86_64-linux-gnu-debug.tar.gz
60aeffa9392436f4f1507d5278ba4e08e9485f1943ac309a0129e2654738c90d  guix-build-508b8a4fd1c9/output/x86_64-linux-gnu/dashcore-508b8a4fd1c9-x86_64-linux-gnu.tar.gz
46f582dcdd81b33e916199ddc16e9fc806594775f74b6379f9764e87623f2668  guix-build-508b8a4fd1c9/output/x86_64-w64-mingw32/dashcore-508b8a4fd1c9-win64-debug.zip
024556e3d06d5d0b45ac7e7e59bff057a98ec3a05ed01907ae7f9c98a0e99171  guix-build-508b8a4fd1c9/output/x86_64-w64-mingw32/dashcore-508b8a4fd1c9-win64-setup-unsigned.exe
23bf98423b35ac17971947d11f3850b7d1a10a6e72b77ddcf0b14279253a92d5  guix-build-508b8a4fd1c9/output/x86_64-w64-mingw32/dashcore-508b8a4fd1c9-win64.zip
a14baf9e51bfc16a851bfff28be64b143b3f06d70d9fd4d865d2090b67ecbcde  guix-build-508b8a4fd1c9/output/x86_64-w64-mingw32/dashcore-508b8a4fd1c9-win-unsigned.tar.gz