Support auto-correction comments at rubocop v1.26.0

[ryz310]

The auto-gen-config's auto-correction comments have updated to new style at rubocop v1.26.0. This PR considers the new style.

- # Cop supports --auto-correct.
+ # This cop supports safe auto-correction (--auto-correct).

- # Cop supports --auto-correct-all.
+ # This cop supports unsafe auto-correction (--auto-correct-all).

See also: rubocop/rubocop#10414

[codeclimate]

Code Climate has analyzed commit 8753cf8 and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 99.8% (0.0% change).

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