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

* deps: Make the build flags shared between sites [0df7bd62](https://github.com/gohugoio/hugo/commit/0df7bd62df460a49544845d5332f33b2020b48a1) [@bep](https://github.com/bep) [#6789](https://github.com/gohugoio/hugo/issues/6789)
* Fix baseof with regular define regression [f441f675](https://github.com/gohugoio/hugo/commit/f441f675126ef1123d9f94429872dd683b40e011) [@bep](https://github.com/bep) [#6790](https://github.com/gohugoio/hugo/issues/6790)