chore(deps): bump peter-evans/create-pull-request from 7 to 8 (#867)

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/update-septic-docs-pr.yml

@@ -45,7 +45,7 @@ jobs:
           echo "REF=$ref" >> $GITHUB_ENV
 
       - name: Create Pull Request
-        uses: peter-evans/create-pull-request@v7
+        uses: peter-evans/create-pull-request@v8
         if: ${{ steps.checkfiles.outputs.changed != 0 }}
         with:
           add-paths: |