fix: docs(authentication) blockquote hint color

Author: ivannalon

content/security/authentication.md

@@ -342,7 +342,7 @@ import { jwtConstants } from './constants';
 export class AuthModule {}
 ```
 
-> hint **Hint** We're registering the `JwtModule` as global to make things easier for us. This means that we don't need to import the `JwtModule` anywhere else in our application.
+> info **Hint** We're registering the `JwtModule` as global to make things easier for us. This means that we don't need to import the `JwtModule` anywhere else in our application.
 
 We configure the `JwtModule` using `register()`, passing in a configuration object. See [here](https://github.com/nestjs/jwt/blob/master/README.md) for more on the Nest `JwtModule` and [here](https://github.com/auth0/node-jsonwebtoken#usage) for more details on the available configuration options.