added nonce to analytics (#953)

Co-authored-by: Carrie Arnold <cmarnold@tacc.utexas.edu>

Author: taoteg

taccsite_cms/templates/analytics.html

@@ -5,7 +5,7 @@
     </script>
   {% else %}
     <!-- Global site tag (gtag.js) & Google Analytics Code for Site.  -->
-    <script async src="https://www.googletagmanager.com/gtag/js?id={{ settings.GOOGLE_ANALYTICS_PROPERTY_ID }}"></script>
+    <script async nonce="CSP_NONCE" src="https://www.googletagmanager.com/gtag/js?id={{ settings.GOOGLE_ANALYTICS_PROPERTY_ID }}"></script>
 
     <!-- Analytics Code -->
     <script>