Update changelogs from fern repo (#3329)

fern-support · patrickthornton · web-flow · commit b50fad78856a · 2026-01-28T12:12:07.000-05:00
Co-authored-by: patrickthornton &lt;70873350+patrickthornton@users.noreply.github.com&gt;
diff --git a/fern/products/sdks/overview/csharp/changelog/2026-01-28.mdx b/fern/products/sdks/overview/csharp/changelog/2026-01-28.mdx
@@ -1,3 +1,7 @@
+## 2.19.3
+**`(fix):`** Fully unwrap optional-nullable wrappers when generating undiscriminated unions.
+
+
 ## 2.19.2
 **`(fix):`** Fixes missing references to Core utilities in interface files for the Optional wrapper.
 
