Fix NNER.tag return type for better type safety

Co-authored-by: bact <128572+bact@users.noreply.github.com>

Author: Copilot

pythainlp/tag/named_entity.py

@@ -123,7 +123,7 @@ def load_engine(self, engine: str = "thai_nner") -> None:
 
         self.engine = Thai_NNER()
 
-    def tag(self, text: str) -> tuple[list[str], list[dict[Any, Any]]]:
+    def tag(self, text: str) -> tuple[list[str], list[dict[str, Any]]]:
         """This function tags nested named entities.
 
         :param str text: text in Thai to be tagged