chore(deps): update helm release postgresql to v15.5.5

[renovate]

This PR contains the following updates:

Package	Update	Change
postgresql (source)	patch	15.5.4 -> 15.5.5

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Release Notes

bitnami/charts (postgresql)

v15.5.5

• [bitnami/postgresql] Release 15.5.5 (#​27096)

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