chore(deps): update postgres docker tag to v16

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
postgres	service	major	15 -> 16

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Benchmark for c789f09

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Test	Base	PR	%
mysql/consume/1000	3.1±0.11s	3.1±0.15s	0.00%
mysql/push/1000	1512.6±93.28ms	1408.0±104.77ms	-6.92%
postgres/consume/1000	841.3±37.81ms	818.2±23.56ms	-2.75%
postgres/push/1000	519.6±29.46ms	524.5±75.81ms	+0.94%
redis/consume/1000	551.7±0.43ms	551.8±0.35ms	+0.02%
redis/push/1000	121.4±5.71ms	121.7±8.20ms	+0.25%
sqlite_in_memory/consume/1000	995.5±15.77ms	1000.3±23.71ms	+0.48%
sqlite_in_memory/push/1000	55.7±0.98ms	56.4±2.72ms	+1.26%