Update font-public-sans.rb (#5827)
Update font-public-sans.rb (#5827)

SHA256 checksum seems to be incorrect- getting a mismatch when running brew upgrade, or when manually checking it on file when downloading it directly from the repo. (https://github.com/uswds/public-sans/releases/tag/v2.001)
Have made this pull request with the checksum I get, please could someone confirm.
alerque/homebrew-fonts,alerque/homebrew-fonts