chore(deps): update peter-evans/create-pull-request action to v7

Author: renovate[bot]

.github/workflows/submodule.yml

@@ -77,7 +77,7 @@ jobs:
       - run: bash ./scripts/nb_to_md.sh static/examples/tutorials/advanced src/tutorials/advanced
       - run: bash ./scripts/nb_to_md.sh static/examples/how-to-guides src/how-to-guides
 
-      - uses: peter-evans/create-pull-request@v6
+      - uses: peter-evans/create-pull-request@v7
         with:
           title: '[automated] Submodule update'
           body: This is an automated pull request.