Minor Typo Fix (#1399)

Author: abhishekBansal

auth/README.md

@@ -714,7 +714,7 @@ protected void onActivityResult(int requestCode, int resultCode, Intent data) {
                 // Get the non-anoymous credential from the response
                 AuthCredential nonAnonymousCredential = response.getCredentialForLinking();
                 // Sign in with credential 
-                FirebaseAuth.getInstance().signInWithCredential(nonAnonymousCredential);
+                FirebaseAuth.getInstance().signInWithCredential(nonAnonymousCredential)
                     .addOnSuccessListener(new OnSuccessListener<AuthResult>() {
                         @Override
                         public void onSuccess(AuthResult result) {