crash bug due to missing ENUM

When listening to events, if a frame is navigated by user clicking on a simple link, any attacked event watcher workers will crash.
Tested on latest edge and chrome (chromium 113).
Probably because the CDP has newer events that were not hardcoded in this ENUM. There may be more, I only added the one that was causing crash!

Author: pemn

cdp/page.py

@@ -617,6 +617,7 @@ class ClientNavigationReason(enum.Enum):
     META_TAG_REFRESH = "metaTagRefresh"
     PAGE_BLOCK_INTERSTITIAL = "pageBlockInterstitial"
     RELOAD = "reload"
+    ANCHOR_CLICK = "anchorClick"
 
     def to_json(self) -> str:
         return self.value