Correct typo in AbstractRememberMeServices assertion

web/src/main/java/org/springframework/security/web/authentication/rememberme/AbstractRememberMeServices.java

@@ -418,7 +418,7 @@ public abstract class AbstractRememberMeServices implements RememberMeServices,
      */
     @Deprecated
     public void setUserDetailsService(UserDetailsService userDetailsService) {
-        Assert.notNull(userDetailsService, "UserDetailsService canot be null");
+        Assert.notNull(userDetailsService, "UserDetailsService cannot be null");
         this.userDetailsService = userDetailsService;
     }