Update changelogs from fern repo (#4285)

Author: fern-support

fern/products/sdks/overview/typescript/changelog/2026-03-15.mdx

@@ -0,0 +1,7 @@
+## 3.56.1
+**`(fix):`** Include root markdown files (README.md, reference.md, CONTRIBUTING.md) in
+the output when `outputSourceFiles` is `false`. Previously, the compiled
+CJS/ESM output mode only included the `dist/` directory contents, silently
+dropping generated documentation files.
+
+