font/font-r/font-rounded-mplus: fix source

[bevanjkay]

Important: Do not tick a checkbox if you haven’t performed its action. Honesty is indispensable for a smooth review process.

In the following questions <cask> is the token of the cask you're submitting.

After making any changes to a cask, existing or new, verify:

• The submission is for a stable version or documented exception.
• brew audit --cask --online <cask> is error-free.
• brew style --fix <cask> reports no offenses.

Additionally, if adding a new cask:

• Named the cask according to the token reference.
• Checked the cask was not already refused.
• Checked the cask is submitted to the correct repo.
• brew audit --cask --new <cask> worked successfully.
• HOMEBREW_NO_INSTALL_FROM_API=1 brew install --cask <cask> worked successfully.
• brew uninstall --cask <cask> worked successfully.

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[Aaron-212]

Maybe change how brew audit OSDN urls? Since the certificate of osdn.dl.osdn.jp expired a long time ago.

[Bo98]

It's correct - it's just OSDN as a service is effectively dead at the moment. They are currently looking for buyers so there's still a chance of revival. The URL here is just some random mirror. We can perhaps make the audit only apply if the domain name is osdn.jp rather than a basic string search.