DEV: Correct typos and spelling mistakes (#12812)

Over the years we accrued many spelling mistakes in the code base. 

This PR attempts to fix spelling mistakes and typos in all areas of the code that are extremely safe to change 

- comments
- test descriptions
- other low risk areas

app/controllers/users_email_controller.rb

@@ -80,7 +80,7 @@ class UsersEmailController < ApplicationController
     rate_limit_second_factor!(@user)
 
     if !@error
-      # this is needed becase the form posts this field as JSON and it can be a
+      # this is needed because the form posts this field as JSON and it can be a
       # hash when authenticating security key.
       if params[:second_factor_method].to_i == UserSecondFactor.methods[:security_key]
         begin