Bump peter-evans/create-pull-request from 6 to 7 (railwayapp#1184)

Bumps [peter-evans/create-pull-request](https://github.com/peter-evans/create-pull-request) from 6 to 7.
- [Release notes](https://github.com/peter-evans/create-pull-request/releases)
- [Commits](peter-evans/create-pull-request@v6...v7)

---
updated-dependencies:
- dependency-name: peter-evans/create-pull-request
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/publish.yml

@@ -70,7 +70,7 @@ jobs:
       
       - name: Create Pull Request
         if: ${{ github.event_name == 'push' || github.event_name == 'schedule' || github.event_name == 'workflow_dispatch' }}
-        uses: peter-evans/create-pull-request@v6
+        uses: peter-evans/create-pull-request@v7
         with:
           base: main
           token: ${{ secrets.COMMITTER_TOKEN }}

.github/workflows/update-nixpkgs-archive.yml

@@ -40,7 +40,7 @@ jobs:
           echo "::set-output name=url::$URL"
 
       - name: Create Pull Request
-        uses: peter-evans/create-pull-request@v6
+        uses: peter-evans/create-pull-request@v7
         with:
           token: ${{ secrets.COMMITTER_TOKEN }}
           title: Update nixpkgs archive