Update microsoft-edge-beta from 77.0.235.18 to 77.0.235.20 (#7836)
Update microsoft-edge-beta from 77.0.235.18 to 77.0.235.20 (#7836)

* Update microsoft-edge-beta from 77.0.235.18 to 77.0.235.20

* Update microsoft-edge-beta.rb

* Update microsoft-edge-beta.rb

pkq/homebrew-versions,victorpopkov/homebrew-versions,Ngrd/homebrew-versions,rogeriopradoj/homebrew-versions,lantrix/homebrew-versions,victorpopkov/homebrew-versions,lantrix/homebrew-versions,caskroom/homebrew-versions,Ngrd/homebrew-versions,404NetworkError/homebrew-versions,rogeriopradoj/homebrew-versions,mahori/homebrew-cask-versions,404NetworkError/homebrew-versions,pkq/homebrew-versions,caskroom/homebrew-versions