update docs

config/activation.json

@@ -236,7 +236,7 @@
 
   // You can safely chop off everything from here down from your copy (well, except the closing curly-brace).
 
-  // The settings below rarely be changed, and omitting them is the same as not changing them.
+  // The settings below should rarely be changed, and omitting them is the same as not changing them.
   // You really shouldn't change them unless you know what you're doing.
 
   // -----------