Update peter-evans/create-pull-request action to v8 (#424)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/version-bump.yml

@@ -67,7 +67,7 @@ jobs:
           sed -i "s/VERSION = '.*'/VERSION = '${{ steps.bump-version.outputs.new_version }}'/" lib/workos/version.rb
 
       - name: Create Pull Request
-        uses: peter-evans/create-pull-request@v7
+        uses: peter-evans/create-pull-request@v8
         with:
           token: ${{ steps.generate-token.outputs.token }}
           commit-message: "v${{ steps.bump-version.outputs.new_version }}"