build(deps): 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] <[email protected]>

Author: dependabot[bot]

.github/workflows/plan-release.yml

@@ -45,7 +45,7 @@ jobs:
           GITHUB_AUTH: ${{ secrets.GITHUB_TOKEN }}
         id: explanation
 
-      - uses: peter-evans/create-pull-request@v7
+      - uses: peter-evans/create-pull-request@v8
         name: Create Prepare Release PR
         with:
           commit-message: "Prepare Release ${{ steps.explanation.outputs.new-version}} using 'release-plan'"