Fix kwargs for forms.widgets.Script (#2973)

The annotation for keyword arguments must only be the
type of the value. This fixes PR #2608.

Author: brianhelba

django-stubs/forms/widgets.pyi

@@ -18,7 +18,7 @@ class MediaOrderConflictWarning(RuntimeWarning): ...
 class MediaAsset:
     element_template: str
 
-    def __init__(self, path: str, **attributes: _OptAttrs) -> None: ...
+    def __init__(self, path: str, **attributes: Any) -> None: ...
     def __eq__(self, other: object) -> bool: ...
     def __hash__(self) -> int: ...
     def __html__(self) -> SafeString: ...
@@ -28,7 +28,7 @@ class MediaAsset:
 class Script(MediaAsset):
     element_template: str
 
-    def __init__(self, src: str, **attributes: _OptAttrs) -> None: ...
+    def __init__(self, src: str, **attributes: Any) -> None: ...
 
 class Media:
     def __init__(