Update changelogs from fern repo (#4351)

Author: fern-support

fern/products/sdks/overview/typescript/changelog/2026-03-18.mdx

@@ -1,3 +1,12 @@
+## 3.59.3
+**`(fix):`** Fix npm publish authentication failing when the registry URL includes a port number.
+The `.npmrc` auth token key was constructed using `URL.hostname` (which strips the port)
+instead of `URL.host` (which preserves it). For example, a registry at
+`http://host.docker.internal:4873` would write the token under
+`//host.docker.internal/:_authToken` instead of the correct
+`//host.docker.internal:4873/:_authToken`.
+
+
 ## 3.59.2
 **`(fix):`** Fix passthrough `fetch()` method failing when no environment is explicitly set on
 multi-URL environment SDKs. When the user relies on the default environment,