freedink: Fix build on Ventura

[iMichka]

Fixes:
cannot initialize a variable of type 'char *' with an rvalue of type 'const char *'

• Have you followed the guidelines for contributing?
• Have you ensured that your commits follow the commit style guide?
• Have you checked that there aren't other open pull requests for the same formula update/change?
• Have you built your formula locally with brew install --build-from-source <formula>, where <formula> is the name of the formula you're submitting?
• Is your test running fine brew test <formula>, where <formula> is the name of the formula you're submitting?
• Does your build pass brew audit --strict <formula> (after doing brew install --build-from-source <formula>)? If this is a new formula, does it pass brew audit --new <formula>?

---

[iMichka]

I will submit the patch upstream if the build works

[chenrui333]

it works 👍