Update changelogs from fern repo (#5101)

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

Author: fern-support

fern/products/cli-api-reference/cli-changelog/2026-04-22.mdx

@@ -1,3 +1,11 @@
+## 4.88.0
+**`(feat):`** `fern generate` now accepts multiple `--group` flags. Passing e.g.
+`fern generate --group typescript --group java --group python` generates
+for all of the listed groups instead of failing with
+`'typescript,java,python' is not a valid group or alias`. Each value is
+resolved independently (including aliases) and the union is generated.
+
+
 ## 4.87.1
 **`(fix):`** Gracefully handle "Self-referencing circular pointer" errors from OpenAPI specs.
 Instead of failing the entire publish, the CLI now logs a warning with the