chore(deps): update docker.io/library/postgres docker tag to v16

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
docker.io/library/postgres	major	15.4 -> 16.0

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🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ EDITORCONFIG	editorconfig-checker	1		0	0.02s
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✅ REPOSITORY	trivy	yes		no	4.89s
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✅ YAML	v8r	1		0	2.32s
✅ YAML	yamllint	1		0	0.25s

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