Update mkdocs.yml (#433)

Author: gkorland

mkdocs.yml

@@ -7,9 +7,6 @@ google_analytics:
   - 'UA-92003007-1'
   - 'auto'
 
-extra_javascript:
-  - gtm.js
-
 use_directory_urls: true
 
 theme:
@@ -28,7 +25,8 @@ theme:
 
 extra_javascript:
   - 'https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0/MathJax.js?config=TeX-MML-AM_CHTML'
-
+  - gtm.js
+  
 nav:
   - 'Home': index.md
   - 'Introduction': intro.md