Update Redis versions in README.md #134

Job	Run time
test (macos-latest, mongodb-4.4.10.sh)	27s
test (macos-latest, mongodb-5.0.3.sh)	28s
test (macos-latest, mysql-5.7.31.sh)	38s
test (macos-latest, mysql-8.0.30.sh)	50s
test (macos-latest, postgresql-12.4.sh)	24s
test (macos-latest, postgresql-13.2.sh)	33s
test (macos-latest, redis-6.2.14.sh)	27s
test (macos-latest, redis-7.2.5.sh)	37s
test (ubuntu-latest, mongodb-4.4.10.sh)	18s
test (ubuntu-latest, mongodb-5.0.3.sh)	17s
test (ubuntu-latest, mysql-5.7.31.sh)	38s
test (ubuntu-latest, mysql-8.0.30.sh)	31s
test (ubuntu-latest, postgresql-12.4.sh)	3m 20s
test (ubuntu-latest, postgresql-13.2.sh)	3m 14s
test (ubuntu-latest, redis-6.2.14.sh)	1m 12s
test (ubuntu-latest, redis-7.2.5.sh)	1m 58s
	15m 52s

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