docs(locators): Fix wrong python api usage (microsoft#39524)

Signed-off-by: WEGFan <wegfan@weg.fan>

Author: WEGFan

docs/src/locators.md

@@ -1207,10 +1207,10 @@ const button = page.getByRole('button').and(page.getByTitle('Subscribe'));
 Locator button = page.getByRole(AriaRole.BUTTON).and(page.getByTitle("Subscribe"));
 ```
 ```python async
-button = page.get_by_role("button").and_(page.getByTitle("Subscribe"))
+button = page.get_by_role("button").and_(page.get_by_title("Subscribe"))
 ```
 ```python sync
-button = page.get_by_role("button").and_(page.getByTitle("Subscribe"))
+button = page.get_by_role("button").and_(page.get_by_title("Subscribe"))
 ```
 ```csharp
 var button = page.GetByRole(AriaRole.Button).And(page.GetByTitle("Subscribe"));