Update changelogs from fern repo (#5265)

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

Author: fern-support

fern/products/cli-api-reference/cli-changelog/2026-04-30.mdx

@@ -1,3 +1,10 @@
+## 5.2.1
+**`(fix):`** Fix auth scheme descriptions being lost when using generators.yml auth-schemes.
+When security schemes are overridden in generators.yml, Fern now preserves the
+descriptions from the OpenAPI spec's components.securitySchemes instead of using
+generic placeholder text.
+
+
 ## 5.2.0
 **`(feat):`** Add `multi-source` property to docs.yml `instances` configuration. When enabled, docs registration
 uses a basepath-aware S3 key format, allowing multiple independent doc sites to be hosted under the