All PRs failing 'review' check

[ravenclaw900]

General troubleshooting steps

• I understand that if I ignore these instructions, my issue may be closed without review.
• N/A I have retried my command with --force.
• N/A I ran brew update-reset && brew update and retried my command.
• N/A I ran brew doctor, fixed as many issues as possible and retried my command.
• N/A I have checked the instructions for reporting bugs.
• N/A I made doubly sure this is not a checksum does not match error.

Description of issue

All the PRs are failing the 'review' check. Because of this, @BrewTestBot isn't auto-merging them.

Command that failed

/usr/bin/docker run --name e4227c260e95f74da1933f7c4451ca193a_77d356 --label 5588e4 --workdir /github/workspace --rm -e INPUT_TOKEN -e HOME -e GITHUB_JOB -e GITHUB_REF -e GITHUB_SHA -e GITHUB_REPOSITORY -e GITHUB_REPOSITORY_OWNER -e GITHUB_RUN_ID -e GITHUB_RUN_NUMBER -e GITHUB_RETENTION_DAYS -e GITHUB_ACTOR -e GITHUB_WORKFLOW -e GITHUB_HEAD_REF -e GITHUB_BASE_REF -e GITHUB_EVENT_NAME -e GITHUB_SERVER_URL -e GITHUB_API_URL -e GITHUB_GRAPHQL_URL -e GITHUB_WORKSPACE -e GITHUB_ACTION -e GITHUB_EVENT_PATH -e GITHUB_ACTION_REPOSITORY -e GITHUB_ACTION_REF -e GITHUB_PATH -e GITHUB_ENV -e RUNNER_OS -e RUNNER_TOOL_CACHE -e RUNNER_TEMP -e RUNNER_WORKSPACE -e ACTIONS_RUNTIME_URL -e ACTIONS_RUNTIME_TOKEN -e ACTIONS_CACHE_URL -e GITHUB_ACTIONS=true -e CI=true -v "/var/run/docker.sock":"/var/run/docker.sock" -v "/home/runner/work/_temp/_github_home":"/github/home" -v "/home/runner/work/_temp/_github_workflow":"/github/workflow" -v "/home/runner/work/_temp/_runner_file_commands":"/github/file_commands" -v "/home/runner/work/homebrew-cask/homebrew-cask":"/github/workspace" 5588e4:227c260e95f74da1933f7c4451ca193a

Output of command

/review.rb:7:in `require': cannot load such file -- git_diff (LoadError)
	from /review.rb:7:in `<main>'

Output of command with --verbose --debug

N/A

Output of brew doctor --verbose

N/A

Output of brew tap

N/A