smart-converter-pro: update checksum, remove rosetta caveat

[krehel]

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.

---

smart-converter-pro
  * exception while auditing smart-converter-pro: SHA256 mismatch
    Expected: 6690f2c2fa5c8147699ca5226b37f6177a01ff0df93c5f77c4254e86a81e0d18
      Actual: 2ab2d7e478eba3c54a46480589a10a94c6c00627b7375eae710877acdecc5050
        File: ../downloads/3a6a2c0ee079479d81d8970155ca1cf565beaa51ae93a39ce7cdb14f89507bb4--SmartConverterPro-3.1.6.dmg

[krehel]

Note: livecheck works for me locally without issues.

[khipp]

It works fine on my end, too.