Bump peter-evans/create-pull-request from 7 to 8

Bumps [peter-evans/create-pull-request](https://github.com/peter-evans/create-pull-request) from 7 to 8.
- [Release notes](https://github.com/peter-evans/create-pull-request/releases)
- [Commits](peter-evans/create-pull-request@v7...v8)

---
updated-dependencies:
- dependency-name: peter-evans/create-pull-request
  dependency-version: '8'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/cleanup.yml

@@ -65,7 +65,7 @@ jobs:
       - name: Create Pull Request if necessary
         id: create-pr
         #gt-placeholder-gh-action-create-pull-request-start
-        uses: peter-evans/create-pull-request@v7
+        uses: peter-evans/create-pull-request@v8
         #gt-placeholder-gh-action-create-pull-request-end
         with:
           #gt-placeholder-branch-start

.github/workflows/gt-update.yml

@@ -149,7 +149,7 @@ jobs:
       - name: Create pull request if necessary
         if: ${{ steps.has_changes.outputs.has_changes == 1 }}
         #gt-placeholder-gh-action-create-pr-start
-        uses: peter-evans/create-pull-request@v7
+        uses: peter-evans/create-pull-request@v8
         #gt-placeholder-gh-action-create-pr-end
         with:
           branch: 'gt/update/${{ matrix.remote }}'