Bump peter-evans/create-pull-request from v3.6.0 to v3.7.0 (#225)

Bumps [peter-evans/create-pull-request](https://github.com/peter-evans/create-pull-request) from v3.6.0 to v3.7.0.
- [Release notes](https://github.com/peter-evans/create-pull-request/releases)
- [Commits](https://github.com/peter-evans/create-pull-request/compare/v3.6.0...2455e1596942c2902952003bbb574afbbe2ab2e6)

Signed-off-by: dependabot[bot] <support@github.com>

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

.github/workflows/autoprefixer.yml

@@ -21,7 +21,7 @@ jobs:
           npm run autoprefixer
 
       - name: Create Pull Request
-        uses: peter-evans/create-pull-request@v3.6.0
+        uses: peter-evans/create-pull-request@v3.7.0
         with:
           branch: autoprefixer
           branch-suffix: timestamp