Fix media accept config type (home-assistant#147445)

Author: balloob

homeassistant/helpers/selector.py

@@ -1010,9 +1010,11 @@ def __call__(self, data: Any) -> dict[str, float]:
         return location
 
 
-class MediaSelectorConfig(BaseSelectorConfig):
+class MediaSelectorConfig(BaseSelectorConfig, total=False):
     """Class to represent a media selector config."""
 
+    accept: list[str]
+
 
 @SELECTORS.register("media")
 class MediaSelector(Selector[MediaSelectorConfig]):