fix: adjust benchmarks parameters #28

Job	Run time
PostgreSQL Writes Benchmark	4h 3m 18s
PostgreSQL Reads Benchmark	2h 16m 22s
SQLite Reads Benchmark	2h 7m 19s
MySQL Reads Benchmark	32m 16s
SQLite Writes Benchmark	2h 21m 1s
MySQL Writes Benchmark	6h 0m 20s
Push Results	6s
	17h 20m 42s

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