Update changelogs from fern repo (#985)

Co-authored-by: tstanmay13 <[email protected]>

Author: fern-support

fern/products/sdks/overview/java/changelog/2025-09-25.mdx

@@ -1,3 +1,8 @@
+## 3.6.1
+**`(fix):`** Fixed wire tests failing with InvalidDefinitionException for Optional<T> serialization by using
+the configured ObjectMappers.JSON_MAPPER instead of plain ObjectMapper.
+
+
 ## 3.6.0
 **`(feat):`** Add support for PR mode for self-hosted/local sdk generation.