Keep only major.minor version in README #4976

Job	Run time
Run examples in 'session-example' on MySQL	2m 6s
Run examples in 'native-sql-example' on PostgreSQL	1m 59s
Test with MySQL	4m 1s
Test with PostgreSQL	3m 37s
Run examples in 'session-example' on PostgreSQL	2m 1s
Test with MSSQLServer	4m 17s
Test with MariaDB	3m 36s
Test with CockroachDB	5m 38s
Test with Java 20	3m 45s
Test with Java 17	3m 47s
Test with Oracle	4m 58s
Test with Db2	5m 22s
Test with Java 25-ea	3m 39s
Test with Java 24	3m 37s
Test with Java 21	3m 23s
Test with Java 26-ea	3m 42s
	59m 28s

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