docs(changeset): Generate null type and return null data for the empty responses instead of an empty object {}.

Author: radist2s

.changeset/red-mirrors-add.md

@@ -0,0 +1,7 @@
+---
+'@openapi-qraft/tanstack-query-react-plugin': minor
+'@openapi-qraft/test-fixtures': minor
+'@openapi-qraft/react': minor
+---
+
+Generate `null` type and return `null` data for the empty (204) responses instead of an empty object `{}`.

.changeset/strong-mugs-fry.md

@@ -8,4 +8,4 @@ Generate types for empty responses
 
 Now, for both successful and error responses, we generate types for all possible response outcomes.
 For instance, if a 204 (No Content) response is possible, we now explicitly generate a type for it
-(represented as `undefined` in the generated code) instead of omitting it.
+(represented as `null` in the generated code) instead of omitting it.