[py] Fix type hints and docstring (#12067)

Co-authored-by: Diego Molina <[email protected]>

Author: M1troll

py/selenium/webdriver/remote/webelement.py

@@ -148,7 +148,7 @@ def get_dom_attribute(self, name) -> str:
         """
         return self._execute(Command.GET_ELEMENT_ATTRIBUTE, {"name": name})["value"]
 
-    def get_attribute(self, name) -> str:
+    def get_attribute(self, name) -> str | None:
         """Gets the given attribute or property of the element.
 
         This method will first try to return the value of a property with the
@@ -265,8 +265,8 @@ def location_once_scrolled_into_view(self) -> dict:
         on the screen an element is so that we can click it. This method should
         cause the element to be scrolled into view.
 
-        Returns the top lefthand corner location on the screen, or
-        ``None`` if the element is not visible.
+        Returns the top lefthand corner location on the screen, or zero
+        coordinates if the element is not visible.
         """
         old_loc = self._execute(
             Command.W3C_EXECUTE_SCRIPT,