attempt to fix build problem by updating peter-evans (#776)

Author: googley42

.github/workflows/site.yml

@@ -71,7 +71,7 @@ jobs:
         git add README.md
         git commit -m "Update README.md" || echo "No changes to commit"
     - name: Create Pull Request
-      uses: peter-evans/create-pull-request@v4.2.3
+      uses: peter-evans/create-pull-request@v7.0.6
       with:
         body: |-
           Autogenerated changes after running the `sbt docs/generateReadme` command of the [zio-sbt-website](https://zio.dev/zio-sbt) plugin.