[MAINT] change m2r to m2r2 #1198

Job	Run time
Determine if CI should be skipped	7s
Estimator performance tests (ubuntu-latest, 3.8)	6m 58s
Unit tests with minimum dependency versions (ubuntu-latest, 3.8)	50m 20s
Corrector performance tests (ubuntu-latest, 3.8)	31m 7s
Unit tests (ubuntu-latest, 3.8)	43m 15s
CBMR ImportError tests (ubuntu-latest, 3.8)	54s
Smoke performance tests (ubuntu-latest, 3.8)	21m 17s
Unit tests (ubuntu-latest, 3.9)	48m 34s
Unit tests (ubuntu-latest, 3.10)	43m 25s
Unit tests (ubuntu-latest, 3.11)	43m 31s
Unit tests (ubuntu-latest, 3.12)	47m 58s
Unit tests (macos-latest, 3.8)	47m 7s
Unit tests (macos-latest, 3.9)	26m 53s
Unit tests (macos-latest, 3.10)	25m 53s
Unit tests (macos-latest, 3.11)	28m 50s
Unit tests (macos-latest, 3.12)	22m 25s
Upload coverage	18s
	8h 8m 52s

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