Fixing typo.

plugins/colorize/colorize.plugin.zsh

@@ -1,4 +1,4 @@
-# Plugin for highligthing file content
+# Plugin for highlighting file content
 # Plugin highlights file content based on the filename extension.
 # If no highlighting method supported for given extension then it tries 
 # guess it by looking for file content.
@@ -25,4 +25,4 @@ colorize_via_pygmentize() {
             pygmentize -g "$FNAME"
         fi
     done
-}
+}