Update changelogs from fern repo (#5006)

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

Author: fern-support

fern/products/cli-api-reference/cli-changelog/2026-04-20.mdx

@@ -1,3 +1,8 @@
+## 4.79.3
+**`(fix):`** Support `x-fern-discriminator-context` extension on OpenAPI discriminator objects and auto-infer
+`protocol` context for SSE-shaped discriminated unions.
+
+
 ## 4.79.2
 **`(fix):`** Fix AsyncAPI bundler silently degrading typed models to `unknown` when
 multi-file specs use file-local `$ref` pointers (e.g. `$ref: '#/Sibling'`)