Bump peter-evans/create-pull-request from 7 to 8 (#674)

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
...

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

Author: dependabot[bot]

.github/workflows/ci_update_requirements.yml

@@ -100,7 +100,7 @@ jobs:
     - name: Create PR
       if: steps.update_requirements.outputs.update_deps == 'true'
       id: cpr
-      uses: peter-evans/create-pull-request@v7
+      uses: peter-evans/create-pull-request@v8
       with:
         token: ${{ secrets.RELEASE_PAT }}
         commit-message: "Update `requirements.txt`"