Fix text-shadow CSS.

The semicolons made it look like the end of a declaration. I got these
errors in the Firefox console:

Expected declaration but found ‘1px’.  Skipped to next declaration. 1 embed.html:29:17
Expected declaration but found ‘-1px’.  Skipped to next declaration. 1 embed.html:30:17

proxy/static/embed.html

@@ -25,8 +25,8 @@
     font-variant: small-caps;
     text-shadow: 0 0 5px #fef,
                  0 1px 2px #fef,
-                 0 -1px 2px #fef;
-                 1px 0px 3px #fef;
+                 0 -1px 2px #fef,
+                 1px 0px 3px #fef,
                  -1px 0px 3px #fef;
   }
   .active {