Update peter-evans/create-pull-request action to v7

Author: renovate[bot]

.github/workflows/bump_repos.yml

@@ -16,7 +16,7 @@ jobs:
       - name: Bump cos 🔧
         run: earthly +bump-repositories
       - name: Create Pull Request
-        uses: peter-evans/create-pull-request@v5
+        uses: peter-evans/create-pull-request@v7
         with:
           token: ${{ secrets.PAT_TOKEN }}
           push-to-fork: ci-forks/osbuilder