build(deps): bump freckle/mergeabot-action from 1 to 2

[dependabot[bot]]

Bumps freckle/mergeabot-action from 1 to 2.

Commits

• 7acfe50 Update README
• 87f844f Update bin/automerge-prs
• 69e7217 Reverse order of approve-enable
• 140f77e Restyled by prettier-markdown
• 2d036e9 Fix private-key secret
• ea272b6 Update documentation for opened-only usage
• 4adaa10 Only comment on PR opened events
• fba6d2f Measure quarantine from createdAt, not updateAt
• 09d833d Use freckle-automation App instead of token for CI
• See full diff in compare view

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