Add sha-256 sum for Google Analytics isogram script

Author: calebhearth

static.json

@@ -2,7 +2,7 @@
   "clean_urls": true,
   "headers": {
     "/**": {
-      "Content-Security-Policy": "default-src 'self'; script-src https://static.ads-twitter.com https://www.google-analytics.com; img-src 'self' https://s3.amazonaws.com https://twitter.com https://pbs.twimg.com; font-src 'self' https://fonts.gstatic.com; style-src 'self' https://fonts.googleapis.com; frame-ancestors 'none';",
+      "Content-Security-Policy": "default-src 'self'; script-src https://static.ads-twitter.com https://www.google-analytics.com 'sha256-q2sY7jlDS4SrxBg6oq/NBYk9XVSwDsterXWpH99SAn0='; img-src 'self' https://s3.amazonaws.com https://twitter.com https://pbs.twimg.com; font-src 'self' https://fonts.gstatic.com; style-src 'self' https://fonts.googleapis.com; frame-ancestors 'none';",
       "Strict-Transport-Security": "max-age=63072000; includeSubDomains; preload",
       "X-Content-Type-Options": "nosniff",
       "X-Frame-Options": "DENY",