changed sha256 digest because sha256 mismatch has occured.

error log:
==> Downloading http://packages.groonga.org/source/mroonga/mroonga-3.06.tar.gz
Already downloaded: /Library/Caches/Homebrew/mroonga-3.06.tar.gz
Error: SHA256 mismatch
Expected: a7211ade53c8abbb923be5818d51d259cf98bb3ab3f0b10d80d51050fdbaf959
Actual: 5ff308524a0e85d8e86181d65c5a64475653a2a57d6022b5a5b188a5d0a375b1