chore(deps): update helm release postgresql to v15.5.7

This MR contains the following updates:

Package	Update	Change
postgresql (source)	patch	15.5.5 -> 15.5.7

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Release Notes

bitnami/charts (postgresql)

v15.5.7

• [bitnami/postgresql] Release 15.5.7 (#​27401)

v15.5.6

• [bitnami/postgresql] Release 15.5.6 (#​27293) (d36be80), closes #​27293

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Configuration

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