Update changelogs from fern repo (#5591)

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

Author: fern-support

fern/products/cli-api-reference/cli-changelog/2026-05-21.mdx

@@ -1,3 +1,16 @@
+## 5.36.0
+**`(feat):`** cli-v2: add `fern update` command for installing and switching between CLI
+versions. Includes `fern update`, `fern update list`, `fern update use
+<version>`, `fern update --check`, and `fern update --to <version>`. Versions
+are stored in `~/.cache/fern/v1/versions/<version>/` and tracked in
+`~/.fernrc` under the new `cli` field. A new opt-in `--versions` flag was
+added to `fern cache clear`; the default behavior continues to leave
+installed CLI binaries untouched. `fern cache show` now reports the versions
+cache alongside IR and logs. After every successful command, the CLI runs a
+rate-limited (24-hour) probe against the release feed and prints a one-line
+nag when a newer version is available.
+
+
 ## 5.35.5
 **`(chore):`** Bump @fern-api/venus-api-sdk from 0.22.34 to 4.0.0, fixing a bug where
 Authorization headers were silently dropped on org GET endpoints.