docs(modulerr): fix typo

Closes angular#4418

Author: gh-naylor

docs/content/error/injector/modulerr.ngdoc

@@ -6,6 +6,6 @@
 This error occurs when a module fails to load due to some exception. The error
 message above should provide additional context.
 
-In AngularJS `1.2.0` and later, `ngRoute` has been moved ot its own module.
+In AngularJS `1.2.0` and later, `ngRoute` has been moved to its own module.
 If you are getting this error after upgrading to `1.2.x`, be sure that you've
 installed {@link api/ngRoute `ngRoute`}.