Update peter-evans/create-pull-request action to v8 (#1005)

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

Author: renovate[bot]

.github/workflows/update-sponsors.yml

@@ -23,7 +23,7 @@ jobs:
     - run: git config --global --add safe.directory "$GITHUB_WORKSPACE"
 
     - name: Create Pull Request
-      uses: peter-evans/create-pull-request@v7
+      uses: peter-evans/create-pull-request@v8
       with:
         commit-message: "Updating sponsors"
         title: "Updating sponsors"