Bump peter-evans/create-pull-request from 5 to 6 (#21)

Bumps [peter-evans/create-pull-request](https://github.com/peter-evans/create-pull-request) from 5 to 6.
- [Release notes](https://github.com/peter-evans/create-pull-request/releases)
- [Commits](peter-evans/create-pull-request@v5...v6)

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

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

Author: dependabot[bot]

.github/workflows/compress-images.yml

@@ -20,7 +20,7 @@ jobs:
           compressOnly: true
       - name: Create New Pull Request If Needed
         if: steps.calibre.outputs.markdown != ''
-        uses: peter-evans/create-pull-request@v5
+        uses: peter-evans/create-pull-request@v6
         with:
           title: Compressed Images Nightly
           branch-suffix: timestamp