chore: Update change date for 1.3.12 #1556

Job	Run time
Run test with Postgres	4m 29s
Run test with Postgres and JSONB payload	2m 25s
Run tests with Yugabyte	5m 21s
Docs	1m 35s
Run test with SQL Server	4m 22s
Run test with Postgres and several data partitions	3m 58s
Checks	2m 47s
Run test with H2	3m 50s
	28m 47s

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