chore(ci): update changelog generation workflow to target 'next' branch

.github/workflows/generate-changelog.yml

@@ -2,7 +2,7 @@ name: Generate Changelog
 
 on:
   push:
-    branches: [ main ]
+    branches: [ next ]
   workflow_dispatch:
 
 permissions:
@@ -33,4 +33,4 @@ jobs:
           git config user.email 'github-actions[bot]@users.noreply.github.com'
           git add CHANGELOG.md
           git commit -m "docs: update changelog"
-          git push https://${{ secrets.GITHUB_TOKEN }}@github.com/${GITHUB_REPOSITORY}.git main
+          git push https://${{ secrets.GITHUB_TOKEN }}@github.com/${GITHUB_REPOSITORY}.git next