Update changelogs from fern repo (#4371)

Co-authored-by: davidkonigsberg <72822263+davidkonigsberg@users.noreply.github.com>

Author: fern-support

fern/products/sdks/overview/java/changelog/2026-03-18.mdx

@@ -41,7 +41,7 @@ try-with-resources, calling `disconnect()` automatically on scope exit.
 lets callers tune max retries, backoff delay, and queue size before
 calling `connect()`.
 
-**Generic onMessage(Consumer<String>) handler** — fires for every
+**Generic `onMessage(`Consumer<String>`)` handler** — fires for every
 incoming text frame with the raw JSON string, before type-specific
 dispatch. Useful for logging or custom routing.