chore(deps): bump peter-evans/create-pull-request from 6 to 7

Bumps [peter-evans/create-pull-request](https://github.com/peter-evans/create-pull-request) from 6 to 7.
- [Release notes](https://github.com/peter-evans/create-pull-request/releases)
- [Commits](peter-evans/create-pull-request@v6...v7)

---
updated-dependencies:
- dependency-name: peter-evans/create-pull-request
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/watch-dependencies.yaml

@@ -87,7 +87,7 @@ jobs:
       # ref: https://github.com/peter-evans/create-pull-request
       - name: Create a PR
         if: github.event_name != 'pull_request'
-        uses: peter-evans/create-pull-request@v6
+        uses: peter-evans/create-pull-request@v7
         with:
           token: "${{ secrets.jupyterhub_bot_pat }}"
           author: JupterHub Bot Account <[email protected]>
@@ -120,7 +120,7 @@ jobs:
       # ref: https://github.com/peter-evans/create-pull-request
       - name: Create a PR
         if: github.event_name != 'pull_request'
-        uses: peter-evans/create-pull-request@v6
+        uses: peter-evans/create-pull-request@v7
         with:
           token: "${{ secrets.jupyterhub_bot_pat }}"
           author: JupyterHub Bot Account <[email protected]>