docs/browsers.md: noVNC webkit bug link format.

docs/browsers.md

@@ -120,7 +120,7 @@
   (Chrome/Chromium after build 57838) have a Canvas rendering bug. The
   WebKit bug is <a
   href="https://bugs.webkit.org/show_bug.cgi?id=46319">#46319</a>.
-  This is noVNC bug <a
+  The noVNC bug is <a
   href="http://github.com/kanaka/novnc/issues/#issue/28">#28</a>.