ci: set artifact_type=skill for release upload

.github/workflows/release_skill.yaml

@@ -67,7 +67,7 @@ jobs:
           url = 'https://jc2009.com/api/upload'
           slug = os.environ['SLUG']
           version = os.environ['VERSION']
-          payload = {'plugin_name': slug, 'version': version}
+          payload = {'plugin_name': slug, 'version': version, 'artifact_type': 'skill'}
           with open(f'{slug}.zip', 'rb') as f:
               res = requests.post(url, data=payload, files={'file': f})
           print(f'Upload Result: {res.text}')