Update changelogs from fern repo (#5173)

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

Author: fern-support

fern/products/sdks/generators/go/changelog/2026-04-27.mdx

@@ -1,3 +1,10 @@
+## 1.38.1
+**`(fix):`** Fix casing bug where a single-letter uppercase word between a lowercase word and a
+PascalCase word (e.g. the `I` in `WhoAmIResponseData`) was merged into the following
+word, producing `WhoAmIresponseData`. `splitWords` now matches lodash's `words()`
+behaviour and tokenizes this as `Who|Am|I|Response|Data`.
+
+
 ## 1.38.0
 **`(feat):`** Use auth scheme placeholder values in README snippets when configured via
 `placeholder` field on auth schemes.