Fix bug with saving an edited declaration

[allisonking]

Closes #3619

Code Changes

• Make sure to include the newly created declaration when sending a payload for editing
• Cypress test

Steps to Confirm

• See steps in issue

Pre-Merge Checklist

• All CI Pipelines Succeeded
• Documentation:
  • documentation complete, PR opened in fidesdocs
  • documentation issue created in fidesdocs
• Issue Requirements are Met
• Relevant Follow-Up Issues Created
• Update CHANGELOG.md
• For API changes, the Postman collection has been updated

Description Of Changes

Write some things here about the changes and any potential caveats

[cypress]

Passing run #2806 ↗︎

0	4	0	0	0
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Details:

Merge 9c9a673 into a361329...
Project: fides	Commit: 9353d854a1 ℹ️
Status: Passed	Duration: 00:43 💡
Started: Jun 20, 2023 6:51 PM	Ended: Jun 20, 2023 6:52 PM

_{This comment has been generated by cypress-bot as a result of this project's GitHub integration settings.}

[adamsachs]

works great, thank you for the quick fix and for including test coverage!