Mark first argument of __[get|set|del]attr__ as str (#9245)

stubs/fpdf2/fpdf/deprecation.pyi

@@ -1,5 +1,5 @@
 from types import ModuleType
 
 class WarnOnDeprecatedModuleAttributes(ModuleType):
-    def __getattr__(self, name): ...
-    def __setattr__(self, name, value) -> None: ...
+    def __getattr__(self, name: str): ...
+    def __setattr__(self, name: str, value) -> None: ...

stubs/fpdf2/fpdf/recorder.pyi

@@ -4,7 +4,7 @@ class FPDFRecorder:
     pdf: Any
     accept_page_break: bool
     def __init__(self, pdf, accept_page_break: bool = ...) -> None: ...
-    def __getattr__(self, name): ...
+    def __getattr__(self, name: str): ...
     def rewind(self) -> None: ...
     def replay(self) -> None: ...