text: Title: Mutation filters not working
  Body: When specifying a mutation filter as per the docs, the filter does not appear in the generated schema:
  
  ```python
  @strawberry.type
  class Mutation:
      updateFruits: List[Fruit] = mutations.update(FruitPartialInput, filters=FruitFilter)
      deleteFruits: List[Fruit] = mutations.delete(filters=FruitFilter)
  ```
  
   - Operating system:
   - Strawberry version (if applicable): 0.195.2