fix(zh/hooks): remove trailing comma in JSON config example

The JSON example in the installation section had a trailing comma after
the hooks object, making it invalid JSON. This prevents users from
copy-pasting the configuration successfully.

zh/06-hooks/README.md

@@ -64,7 +64,7 @@ chmod +x ~/.claude/hooks/*.sh
         ]
       }
     ]
-  },
+  }
 }
 ```