Update models.md (#573)

Author: shobu13

docs/models.md

@@ -120,7 +120,7 @@ Here is a table of the settings available in the Meta object and what they contr
 | Setting                 | Description                                                                                                                                                                                                                                                 | Default                                                         |
 | ----------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------- |
 | global_key_prefix       | A string prefix applied to every Redis key that the model manages. This could be something like your application's name.                                                                                                                                    | ""                                                              |
-| model_key_prefix        | A string prefix applied to the Redis key representing every model. For example, the Redis Hash key for a HashModel. This prefix is also added to the redisearch index created for every model with indexed fields.                                          | ""                                                              |
+| model_key_prefix        | A string prefix applied to the Redis key representing every model. For example, the Redis Hash key for a HashModel. This prefix is also added to the redisearch index created for every model with indexed fields.                                          | f"{new_class.__module__}.{new_class.__name__}"                                                              |
 | primary_key_pattern     | A format string producing the base string for a Redis key representing this model. This string should accept a "pk" format argument. **Note:** This is a "new style" format string, which will be called with `.format()`.                                  | "{pk}"                                                           |
 | database                | A redis.asyncio.Redis or redis.Redis client instance that the model will use to communicate with Redis.                                                                                                                                                         | A new instance created with connections.get_redis_connection(). |
 | primary_key_creator_cls | A class that adheres to the PrimaryKeyCreator protocol, which Redis OM will use to create a primary key for a new model instance.                                                                                                                           | UlidPrimaryKey                                                  |