Fix: type annotation

Author: heptaflar

kaleidoscope/reader.py

@@ -161,7 +161,7 @@ def _auto_engine(self, data_id: str | Path) -> str:
         return self._engine
 
     @property
-    def _chunks(self) -> dict[str:int]:
+    def _chunks(self) -> dict[str, int]:
         """This method does not belong to public API."""
         return self._config[_KEY_CHUNKS]