formula_auditor: skip dependency conflict audit for OpenSSL migration

[carlocab]

• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't other open Pull Requests for the same change?
• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your changes? Here's an example.
• Have you successfully run brew style with your changes locally?
• Have you successfully run brew typecheck with your changes locally?
• Have you successfully run brew tests with your changes locally?

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We can't migrate the entire OpenSSL dependency tree in one go, so we'll
have to skip this audit in the interim.

See Homebrew/homebrew-core#133144.

[MikeMcQuaid]

Came in to 👎🏻, happy to ✅ given it's branch specific.