Bump actions/checkout from 3 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/main.yml

@@ -21,7 +21,7 @@ jobs:
         with:
           go-version: '1.20.6'
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           path: git-sync
 
@@ -38,7 +38,7 @@ jobs:
         with:
           go-version: '1.20.6'
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           path: git-sync
 
@@ -55,7 +55,7 @@ jobs:
         with:
           go-version: '1.20.6'
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           path: git-sync