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

Author: renovate[bot]

.github/workflows/main.yml

@@ -22,7 +22,7 @@ jobs:
           autopep8 --recursive --in-place --aggressive --aggressive .
           isort .
       - name: Create Pull Request
-        uses: peter-evans/create-pull-request@v3
+        uses: peter-evans/create-pull-request@v7
         with:
           commit-message: Auto code format
           title: Fixes by format action