Remove unnecessary closing bracket (mmistakes#1915)

Author: torrocus

docs/_docs/05-configuration.md

@@ -705,7 +705,7 @@ Analytics is disabled by default. To enable globally select one of the following
 | -------------------- | --------------------------------------------------------------- |
 | **google**           | [Google Standard Analytics](https://www.google.com/analytics/)  |
 | **google-universal** | [Google Universal Analytics](https://www.google.com/analytics/) |
-| **google-gtag**      | [Google Analytics Global Site Tag)](https://www.google.com/analytics/) |
+| **google-gtag**      | [Google Analytics Global Site Tag](https://www.google.com/analytics/) |
 | **custom**           | Other analytics providers                                       |
 
 For Google Analytics add your Tracking Code: