Update docstring for create_session() (#1202)

TikTokApi/tiktok.py

@@ -246,7 +246,7 @@ async def create_sessions(
             override_browser_args (list[dict]): A list of dictionaries containing arguments to pass to the browser.
             cookies (list[dict]): A list of cookies to use for the sessions, you can get these from your cookies after visiting TikTok.
             suppress_resource_load_types (list[str]): Types of resources to suppress playwright from loading, excluding more types will make playwright faster.. Types: document, stylesheet, image, media, font, script, textrack, xhr, fetch, eventsource, websocket, manifest, other.
-            browser (str): specify either firefox or chromium, default is chromium
+            browser (str): firefox, chromium, or webkit; default is chromium
             executable_path (str): Path to the browser executable
             timeout (int): The timeout in milliseconds for page navigation