Update changelogs from fern repo (#1743)

Co-authored-by: tstanmay13 <29681256+tstanmay13@users.noreply.github.com>

Author: fern-support

fern/products/sdks/overview/java/changelog/2025-11-03.mdx

@@ -1,3 +1,7 @@
+## 3.11.3
+**`(fix):`** Fix `collapse-optional-nullable` config not being applied in download files mode.
+
+
 ## 3.11.2
 **`(fix):`** Fix IllegalStateException: closed on error responses. Generated clients were calling responseBody.string() twice (once in success handler, once in error handler), but OkHttp's ResponseBody can only be read once. Now pre-reads response body before success check for JSON/text responses.