Bump thomaseizinger/create-pull-request from 1.3.1 to 1.4.0 (#435)

Bumps [thomaseizinger/create-pull-request](https://github.com/thomaseizinger/create-pull-request) from 1.3.1 to 1.4.0.
- [Release notes](https://github.com/thomaseizinger/create-pull-request/releases)
- [Changelog](https://github.com/thomaseizinger/create-pull-request/blob/master/CHANGELOG.md)
- [Commits](thomaseizinger/create-pull-request@1.3.1...1.4.0)

---
updated-dependencies:
- dependency-name: thomaseizinger/create-pull-request
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

.github/workflows/Doxygen.yml

@@ -62,7 +62,7 @@ jobs:
           branch: documentation-update-${{ steps.buildnumber.outputs.build_number }}
 
       - name: Create Pull Request
-        uses: thomaseizinger/create-pull-request@1.3.1
+        uses: thomaseizinger/create-pull-request@1.4.0
         with:
           # A GitHub API token
           github_token: ${{ secrets.PERSONAL_TOKEN }}