Bump peter-evans/create-pull-request from 3 to 6 (#540)

Bumps [peter-evans/create-pull-request](https://github.com/peter-evans/create-pull-request) from 3 to 6.
- [Release notes](https://github.com/peter-evans/create-pull-request/releases)
- [Commits](peter-evans/create-pull-request@v3...v6)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/WatchCondaForge.yml

@@ -55,7 +55,7 @@ jobs:
       - name: Create Pull Request
         if: steps.check_branch.outputs.exists == 'False' && steps.find_replace.outputs.modifiedFiles > 0
         id: cpr
-        uses: peter-evans/create-pull-request@v3
+        uses: peter-evans/create-pull-request@v6
         with:
           committer: Pangeo Bot <pangeo-bot@users.noreply.github.com>
           token: ${{ secrets.PANGEOBOT_TOKEN }}