Update changelogs from fern repo (#1458)

Author: fern-support

fern/products/sdks/overview/java/changelog/2025-10-23.mdx

@@ -1,7 +1,7 @@
 ## 3.9.2
 **`(fix):`** Fix nullable field serialization in PATCH requests with wrapped request bodies. Explicit null values
-`(Nullable.ofNull())` are now correctly serialized as `{"field": null}` instead of being omitted like
-`Nullable.empty()`.
+(Nullable.ofNull()) are now correctly serialized as `{"field": null}` instead of being omitted like
+Nullable.empty().
 
 
 ## 3.9.1