config: fix wording in comment

config.js

 
     // w3c spec-compliant video constraints to use for video capture. Currently
     // used by browsers that return true from lib-jitsi-meet's
-    // util#browser#usesNewGumFlow. The constraints are independency from
+    // util#browser#usesNewGumFlow. The constraints are independent from
     // this config's resolution value. Defaults to requesting an ideal aspect
     // ratio of 16:9 with an ideal resolution of 720.
     // constraints: {