Fix sync-releases: copy to data/releases.json instead of public/

Author: izumix77

.github/workflows/sync-releases.yml

@@ -33,7 +33,7 @@ jobs:
 
       - name: Copy releases.json
         run: |
-          cp releases.json site/public/releases.json
+          cp releases.json site/data/releases.json
 
       - name: Commit & Push
         run: |