Update changelogs from fern repo (#5109)

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

Author: fern-support

fern/products/cli-api-reference/cli-changelog/2026-04-23.mdx

@@ -0,0 +1,14 @@
+## 4.90.0
+**`(internal):`** Implement the FER-9980 autoversion pipeline. A new `GenerationCommitStep` +
+`AutoVersionStep` run between the `[fern-generated]` commit and replay
+detect/apply, diffing prev vs new `[fern-generated]` SHAs (both pure
+generator output), calling Fern AI for a semver bump + changelog entry,
+rewriting the placeholder version, prepending `changelog.md`, and committing
+`[fern-autoversion]`. Consumes the two-phase `@fern-api/replay@0.12.0` API.
+Prep refactors (moved `AutoVersioningService` / `AutoVersioningCache` /
+`VersionUtils` from `@fern-api/local-workspace-runner` into
+`@fern-api/generator-cli/autoversion` to resolve a circular-dep blocker) are
+folded into this entry. Opt-in via `config.autoVersion.enabled`; no
+behavior change for non-replay flows.
+
+