Bump peter-evans/create-pull-request in the gh-actions group (#263)

Bumps the gh-actions group with 1 update: [peter-evans/create-pull-request](https://github.com/peter-evans/create-pull-request).


Updates `peter-evans/create-pull-request` from 8.1.0 to 8.1.1
- [Release notes](https://github.com/peter-evans/create-pull-request/releases)
- [Commits](peter-evans/create-pull-request@c0f553f...5f6978f)

---
updated-dependencies:
- dependency-name: peter-evans/create-pull-request
  dependency-version: 8.1.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: gh-actions
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Caroline Frasca <42614552+carolinefrasca@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/update-lockfiles.yml

@@ -23,7 +23,7 @@ jobs:
           set -euo pipefail
           pixi update --json --no-install | pixi exec pixi-diff-to-markdown >> diff.md
       - name: Create pull request
-        uses: peter-evans/create-pull-request@c0f553fe549906ede9cf27b5156039d195d2ece0 # v8.1.0
+        uses: peter-evans/create-pull-request@5f6978faf089d4d20b00c7766989d076bb2fc7f1 # v8.1.1
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           commit-message: Update pixi lockfile