Update changelogs from fern repo (#970)

Co-authored-by: Swimburger <[email protected]>

Author: fern-support

fern/products/cli-api-reference/cli-changelog/2025-09-24.mdx

@@ -1,3 +1,20 @@
+## 0.81.0
+**`(feat):`** Control how type references are wrapped when they refer to nullable schemas using the new `wrap-references-to-nullable-in-optional` setting:
+- `true`: When a type reference points to a nullable schema, it will be wrapped in `optional<>`.
+- `false`: When a type reference points to a nullable schema, it will be wrapped in `nullable<>`.
+The default is `true`.
+
+
+**`(feat):`** Add new `coerce-optional-schemas-to-nullable` setting to control how optional schemas are treated:
+- `true`: Optional schemas will be coerced to nullable, resulting in `nullable<T>`.
+- `false`: Optional schemas will remain as `optional<T>`.
+The default is `true`.
+
+
+**`(feat):`** Add type for nullable schema examples. 
+If a schema is nullable, examples for its inner type will be parsed or generated, or `null` will be used as an example if no inner examples are available.
+
+
 ## 0.80.2
 **`(chore):`** Update migrations for go to support IRv60.