checksum for cask waterfox (G6.0.9) is wrong

[kateyork]

Verification

• [X] I understand that if I ignore these instructions, my issue may be closed without review.
• [x] I have retried my command with --force.
• [X] I ran brew update-reset && brew update and retried my command.
• [X] I ran brew doctor, fixed as many issues as possible and retried my command.
• [X] I have checked the instructions for reporting bugs.
• [X] I made doubly sure this is not a checksum does not match / SHA256 mismatch error (do not open an issue before trying to open a PR to fix first).

Description of issue

SHA256 checksum is wrong for waterfox.rb, so I get an error "SHA256 mismatch". The version 6.0.9 is the newest one in waterfox.rb, but it seems that the sha256 value in the waterfox.rb file is wrong.

Error: SHA256 mismatch
Expected: 3468876a2d0d6590279eb6ef854df3f64b2ff967c2d638bbf46e278cd4dcf6ad
  Actual: c0433a7e89546dee1df553165760ef050aa72baff46c3b0b215bc83c18e473b7

If I manually download and evaluate the checksum, I get the actual value: c0433a7e89546dee1df553165760ef050aa72baff46c3b0b215bc83c18e473b7

So there must be a problem with the checksum stored in the waterfox.rb file. https://github.com/Homebrew/homebrew-cask/blob/master/Casks/w/waterfox.rb

Thanks!

Command that failed

brew install waterfox

Output of command with --verbose --debug

I don't think that's necessary

Output of brew doctor and brew config

no output

Output of brew tap

homebrew/cask-fonts
homebrew/servicves

[bevanjkay]

Please try to open a PR to fix the issue. We do not keep checksum mismatch issues open unless an attempt has been made to rectify.

[kateyork]

alright thank you!