

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

* snap: Install postcss v8 explicitly as it is now a peer dependency [e9a7ebaf](https://github.com/gohugoio/hugo/commit/e9a7ebaf67a63ffe5e64c3b3aaefe66feb7f1868) [@anthonyfok](https://github.com/anthonyfok) 
* lang/i18n: Fix for language code case issue with pt-br etc. [50682043](https://github.com/gohugoio/hugo/commit/506820435cacb39ce7bb1835f46a15e913b95828) [@bep](https://github.com/bep) [#7804](https://github.com/gohugoio/hugo/issues/7804)
* Merge branch 'release-0.76.3' [49972d07](https://github.com/gohugoio/hugo/commit/49972d07925604fea45afe1ace7b5dcc6efc30bf) [@bep](https://github.com/bep) 
* Add merge helper [c98132e3](https://github.com/gohugoio/hugo/commit/c98132e30e01a9638e61bd888c769d30e4e43ad5) [@bep](https://github.com/bep) 




Add release notes for 0.76.4
releaser: Add release notes for 0.76.4
[ci skip]
