Update changelogs from fern repo (#5304)

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

Author: fern-support

fern/products/cli-api-reference/cli-changelog/2026-05-01.mdx

@@ -1,3 +1,9 @@
+## 5.7.1
+**`(fix):`** Preserve OpenAPI `default` values for array schemas across query parameters,
+headers, request bodies, and response body properties so docs can render
+"Defaults to ..." metadata for arrays.
+
+
 ## 5.7.0
 **`(internal):`** cli-v2: introduce a shared stdin/stdout abstraction so commands uniformly honor
 the Unix `-` marker on I/O flags (stdin for inputs, stdout for outputs), with a