feat: auto-generate changelog in GitHub releases (#705)

Co-authored-by: Gabriel Machado <gabriel.machado@cloudwalk.io>
Co-authored-by: Letta <noreply@letta.com>

.github/workflows/release.yml

@@ -149,9 +149,8 @@ jobs:
           tag_name: ${{ steps.version.outputs.tag }}
           name: Release ${{ steps.version.outputs.tag }}
           body: |
-            Release ${{ steps.version.outputs.tag }}
-            
             Changes from ${{ steps.version.outputs.old_version }} to ${{ steps.version.outputs.new_version }}
+          generate_release_notes: true
           files: letta.js
           fail_on_unmatched_files: true