fix: resolve circular import in updator.py

Author: LIghtJUNction

astrbot/core/star/updator.py

@@ -2,11 +2,10 @@
 import zipfile
 
 from astrbot.core import logger
+from astrbot.core.star.star import StarMetadata
 from astrbot.core.utils.astrbot_path import get_astrbot_plugin_path
 from astrbot.core.utils.io import ensure_dir, remove_dir
-
-from ..star.star import StarMetadata
-from ..updator import RepoZipUpdator
+from astrbot.core.zip_updator import RepoZipUpdator
 
 
 class PluginUpdator(RepoZipUpdator):