This is a bug-fix release with a couple of important fixes.

* Fix language menu config regression [093dacab](https://github.com/gohugoio/hugo/commit/093dacab29a3c6fc363408453d0bc3b1fc159ad5) [@bep](https://github.com/bep) [#8672](https://github.com/gohugoio/hugo/issues/8672)
* config: Fix merge of config with map[string]string values. [4a9d408f](https://github.com/gohugoio/hugo/commit/4a9d408fe0bbf4c563546e35d2be7ade4e920c4c) [@bep](https://github.com/bep) [#8679](https://github.com/gohugoio/hugo/issues/8679)
* markup: Rename Header(s) to Heading(s) in ToC struct [a7e3da24](https://github.com/gohugoio/hugo/commit/a7e3da242f98d4799dad013d7ba2f285717640d6) [@bep](https://github.com/bep)