docs: add just shield auth routes

Co-authored-by: kenjis <kenji.uui@gmail.com>

Author: datamweb

docs/install.md

@@ -152,7 +152,7 @@ If you want to limit all routes (e.g. `localhost:8080/admin`, `localhost:8080/pa
 public $globals = [
     'before' => [
         // ...
-        'session' => ['except' => ['login*', 'register*', 'auth*']],
+        'session' => ['except' => ['login*', 'register', 'auth/a/*']],
     ],
     // ...
 ];