add type hint to use_override parameter

Author: irvanalhaq9

manim/animation/animation.py

@@ -141,7 +141,7 @@ def __init__(
         introducer: bool = False,
         *,
         _on_finish: Callable[[], None] = lambda _: None,
-        use_override=True,  # included here to avoid TypeError if passed from a subclass's constructor
+        use_override: bool = True,  # included here to avoid TypeError if passed from a subclass's constructor
     ) -> None:
         self._typecheck_input(mobject)
         self.run_time: float = run_time