[.github] bump update image digests create-pull-request step dependency (#20501)

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

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

Co-authored-by: Filip Troníček <filip@gitpod.io>

---------

Co-authored-by: Filip Troníček <filip@gitpod.io>

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@67ccf781d68cd99b580ae25a5c18a1cc84ffff1f #v7.0.6
         if: ${{ steps.create_pr.outputs.create_pr == 'true' }}
         with:
           token: ${{ secrets.ROBOQUAT_AUTOMATIC_CHANGELOG }}