restore commercial font (for our now-private repo)

_static/css/dashboard.css

 /* Typography */
 @font-face {
   font-family: 'FSSinclair';
-  src: url("https://docs.deflect.ca/en/stable/_static/fonts/FSSinclair.eot");
-  src: url("https://docs.deflect.ca/en/stable/_static/fonts/FSSinclair.eot?#iefix") format("embedded-opentype"), url("https://docs.deflect.ca/en/stable/_static/fonts/FSSinclair.woff2") format("woff2"), url("https://docs.deflect.ca/en/stable/_static/fonts/FSSinclair.woff") format("woff"), url("https://docs.deflect.ca/en/stable/_static/fonts/FSSinclair.ttf") format("truetype");
+  src: url("../fonts/FSSinclair.eot");
+  src: url("../fonts/FSSinclair.eot?#iefix") format("embedded-opentype"), url("../fonts/FSSinclair.woff2") format("woff2"), url("../fonts/FSSinclair.woff") format("woff"), url("../fonts/FSSinclair.ttf") format("truetype");
   font-weight: normal;
   font-style: normal; }
 @font-face {