fix: typo indentation

Author: soyuka

core/filters.md

@@ -34,8 +34,8 @@ class Book {}
 Note that `property` is used to document the Hydra view. You can also specify an [OpenAPI Parameter](https://api-platform.com/docs/references/OpenApi/Model/Parameter/) if needed.
 A Parameter can be linked to a filter, there are two types of filters:
 
-    - metadata filters, most common are serializer filters (PropertyFilter and GroupFilter) that alter the normalization context
-    - query filters that alter the results of your database queries (Doctrine, Eloquent, Elasticsearch etc.)
+- metadata filters, most common are serializer filters (PropertyFilter and GroupFilter) that alter the normalization context
+- query filters that alter the results of your database queries (Doctrine, Eloquent, Elasticsearch etc.)
 
 ### Alter the Operation via a parameter