Fix grammar in bundle install --binstubs removal message

Author: deivid-rodriguez

bundler/lib/bundler/cli.rb

@@ -241,7 +241,7 @@ def install
 
       if ARGV.include?("--binstubs")
         message = "The --binstubs option will be removed in favor of `bundle binstubs --all`"
-        removed_message = "The --binstubs option have been removed in favor of `bundle binstubs --all`"
+        removed_message = "The --binstubs option has been removed in favor of `bundle binstubs --all`"
         SharedHelpers.major_deprecation(2, message, removed_message: removed_message)
       end