Update changelogs from fern repo (#5197)

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 @@
+## 4.103.0
+**`(feat):`** Support BCP 47 locale tags (e.g. `ja-JP`, `pt-BR`, `zh-Hans-CN`) in the
+`translations` and `languages` fields of `docs.yml`. Previously only
+two-letter language codes were accepted.
+
+
 ## 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/`.