synopsis: Add new Hackage root keys to bootstrap set
packages: cabal-install
prs: #9068

description: {

The two new [Hackage root keyholders](https://github.com/haskell-infra/hackage-root-keys/tree/master/root-keys) were added to the bootstrap set.

- Added Hackage root key for Joachim Breitner
- Added Hackage root key for Mathieu Boespflug

}
