Auto-generate changelog in release notes

Enable generate_release_notes so each release appends a What's Changed
list built from commits and PRs since the previous tag, below the
existing template.

Author: SpookyyQ

.github/workflows/release.yml

@@ -40,7 +40,7 @@ jobs:
           name: ${{ github.ref_name }}
           draft: false
           prerelease: false
-          generate_release_notes: false
+          generate_release_notes: true
           body: |
             ## IPI Stay Fly Driver ${{ github.ref_name }}