[.github] bump update image digests create-pull-request step dependency

Author: kylos101

.github/workflows/update-image-digest.yml

@@ -80,7 +80,7 @@ jobs:
           fi
 
       - name: Create Pull Request
-        uses: peter-evans/create-pull-request@923ad837f191474af6b1721408744feb989a4c27 # v4
+        uses: peter-evans/create-pull-request@v7
         if: ${{ steps.create_pr.outputs.create_pr == 'true' }}
         with:
           token: ${{ secrets.ROBOQUAT_AUTOMATIC_CHANGELOG }}