Bump peter-evans/create-pull-request from 5 to 7

Bumps [peter-evans/create-pull-request](https://github.com/peter-evans/create-pull-request) from 5 to 7.
- [Release notes](https://github.com/peter-evans/create-pull-request/releases)
- [Commits](peter-evans/create-pull-request@v5...v7)

---
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]>

.github/workflows/update-images.yml

@@ -38,7 +38,7 @@ jobs:
         run: |
           ./build-scripts/update-images.sh ${{ matrix.channel }} build-scripts/images.txt
       - name: Create pull request
-        uses: peter-evans/create-pull-request@v5
+        uses: peter-evans/create-pull-request@v7
         with:
           commit-message: update list of images used by ${{ matrix.channel }}
           title: "[${{ matrix.channel }}] Update MicroK8s images"