Update changelogs from fern repo (#5600)

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

Author: fern-support

fern/products/cli-api-reference/cli-changelog/2026-05-22.mdx

@@ -1,3 +1,9 @@
+## 5.37.6
+**`(chore):`** Centralize theme-eligible docs.yml field definitions in @fern-api/configuration
+so theme export, upload, and global theme stitching reference the same source
+of truth.
+
+
 ## 5.37.5
 **`(fix):`** Handle docs preview file watcher startup failures as local environment errors.