Document more breaking changes for resolver output types

Author: Yoad

docs/releases/9.0.0.md

@@ -20,6 +20,7 @@
   - [Changed Resolver `updateById` input args](#changed-resolver-updatebyid-input-args)
   - [`createMany` resolver now validates all records before save](#createmany-resolver-now-validates-all-records-before-save)
   - [Some generated types were renamed](#some-generated-types-were-renamed)
+  - [`findMany` and `findByIds` changed output type](#findMany-and-findbyids-output-type-nonnull)
 - [Misc](#misc)
 - [Thanks](#thanks)
   - [Thanks to contributors](#thanks-to-contributors)
@@ -609,6 +610,10 @@ Before 9.0.0, `graphql-compose-mongoose` would save some records provided to `cr
 - type for `filter._operators` field. Was `OperatorsXXXFilterInput`, which now becomes `XXXFilterOperatorsInput`. This helps keep all generated types with the same prefix for `XXX` entity.
 - in the `count` resolver, we changed the `filter` type name from `Filter` to `FilterCount`. All other resolvers already had `FilterFindMany`, `FilterFindOne`, etc. names; only the `count` resolver did not follow this pattern.
 
+### `findMany` and `findByIds` output type NonNull
+- Output type for the `findMany` resolver is now NonNull of List of NonNull of (WrappedType)
+- Used to be List of NonNull of (WrappedType)
+
 ## Misc
 
 - Refactor `pagination` & `connection` resolvers (now they are dependencies) [#272](https://github.com/graphql-compose/graphql-compose-mongoose/issues/272)