stella: update checksum

[daeho-ro]

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• Have you ensured that your commits follow the commit style guide?
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• Have you built your formula locally with HOMEBREW_NO_INSTALL_FROM_API=1 brew install --build-from-source <formula>, where <formula> is the name of the formula you're submitting?
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---

• tarball checksum changed for v7.0c stella-emu/stella#1098

[daeho-ro]

Based on their CI history,

• https://github.com/stella-emu/stella/actions/runs/12588889586

the commit for tag 7.0c has been changed from

• stella-emu/stella@42c0d99
  to
• stella-emu/stella@c4016ea

they have same diff but just have a different commit hash. So eventually source code is same.

[github-actions]

🤖 An automated task has requested bottles to be published to this PR.

Caution

Please do not push to this PR branch before the bottle commits have been pushed, as this results in a state that is difficult to recover from. If you need to resolve a merge conflict, please use a merge commit. Do not force-push to this PR branch.