Update changelogs from fern repo (#5192)

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 +1,9 @@
+## 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
+with nested variants instead of flattened separate entries (default: `flat`).
+
+
 ## 4.100.3
 **`(fix):`** Fix `fern generate --docs --preview` to register translations for preview URLs.
 Previously, translation registration was skipped entirely in preview mode,