Update _config.yml to add Google Analytics

Author: erogluorhan

_config.yml

@@ -50,6 +50,8 @@ sphinx:
       use_repository_button: true
       use_edit_page_button: true
       use_fullscreen_button: true
+      analytics:
+        google_analytics_id: G-T52X8HNYE8
       github_url: https://github.com/ProjectPythia
       icon_links:
         - name: YouTube