[py] expected_conditions: correct type annotation

Author: Delta456

py/selenium/webdriver/support/expected_conditions.py

@@ -485,13 +485,13 @@ def _predicate(driver: WebDriverOrWebElement):
     return _predicate
 
 
-def frame_to_be_available_and_switch_to_it(locator: Union[Tuple[str, str], str]) -> Callable[[WebDriver], bool]:
+def frame_to_be_available_and_switch_to_it(locator: Union[Tuple[str, str], str, WebElement]) -> Callable[[WebDriver], bool]:
     """An expectation for checking whether the given frame is available to
     switch to.
 
     Parameters:
     ----------
-    locator : Union[Tuple[str, str], str]
+    locator : Union[Tuple[str, str], str, WebElement]
         Used to find the frame.
 
     Returns: