add omitted keyword for nmconnection

Author: gg582

src/languages/freedesktop.js

@@ -29,7 +29,7 @@ export default function(hljs) {
 
   const SECTION = {
     className: 'section',
-    begin: /^\[(Desktop Entry|Unit|Service|Install|Socket|Mount|Automount|Swap|Path|Timer|Slice|Scope|Manager|connection|ipv4|ipv6|802-3-ethernet|802-11-wireless|802-11-wireless-security|vpn|Journal|Bridge|Desktop Action\s+[A-Za-z0-9_-]+)\]$/,
+    begin: /^\[(Desktop Entry|Unit|Service|Install|Socket|Mount|Automount|Swap|Path|Timer|Slice|Scope|Manager|connection|ipv4|wifi|wifi-security|ipv6|802-3-ethernet|802-11-wireless|802-11-wireless-security|vpn|Journal|Bridge|Desktop Action\s+[A-Za-z0-9_-]+)\]$/,
     relevance: 10
   };