Update changelogs from fern repo (#1094)

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

Author: fern-support

fern/products/cli-api-reference/cli-changelog/2025-10-02.mdx

@@ -1,3 +1,21 @@
+## 0.84.4
+**`(fix):`** Fix an issue where some optional properties were converted to required in the OpenAPI parser to Fern Definition.
+
+
+**`(fix):`** Fix an issue where some property descriptions were not being carried over in the OpenAPI parser to Fern Definition.
+
+
+**`(fix):`** Generate more compact Fern Definition when only a type is provided for optional properties.
+```yml
+# Before
+prop:
+  type: optional<Foo>
+
+# After
+prop: optional<Foo>
+```
+
+
 ## 0.84.3
 **`(fix):`** Fix CLI files colliding when running multiple generators in the same group in local generation.