Update changelogs from fern repo (#5193)

Co-authored-by: dsinghvi <10870189+dsinghvi@users.noreply.github.com>

Author: fern-support

fern/products/cli-api-reference/cli-changelog/2026-04-28.mdx

@@ -1,3 +1,10 @@
+## 4.102.0
+**`(feat):`** Add validation to `fern check` / `fern docs check` that verifies all configured
+translation locales have a corresponding directory under `fern/translations/`.
+If a directory is missing, a clear error message is printed showing the expected
+directory structure.
+
+
 ## 4.101.0
 **`(feat):`** Add `websocket-oneof-display` setting to `docs.yml`. When set to `grouped`,
 WebSocket messages with oneOf bodies are rendered as a single parent entry