update fonts

public/lib/ui/mdc-fonts.css

@@ -107,7 +107,7 @@
     font-family: 'Roboto';
     font-style: normal;
     font-weight: 400;
-    src: local('Roboto'), local('Roboto-Regular'), url(https://fonts.gstatic.com/s/roboto/v20/KFOmCnqEu92Fr1Mu4mxKKTU1Kg.woff2) format('truetype');
+    src: local('Roboto'), local('Roboto-Regular'), url(/lib/ui/mdc/roboto/Roboto-Regular.ttf) format('truetype');
     unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
   }
   /* cyrillic-ext */