Update postgresql Docker tag to v15.4.0

[renovate]

This PR contains the following updates:

Package	Update	Change
postgresql (source)	minor	15.2.9 -> 15.4.0

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Release Notes

bitnami/charts (postgresql)

v15.4.0

• [bitnami/postgresql] feat: ✨ 🔒 Add warning when original images are replaced (#​26264)

v15.3.5

• [bitnami/postgresql] Release 15.3.5 updating components versions (#​26147) (0bafcd7), closes #​26147

v15.3.4

• [bitnami/postgresql] Release 15.3.4 updating components versions (#​26142) (231e25b), closes #​26142

v15.3.3

• [bitnami/postgresql] Release 15.3.3 updating components versions (#​26066) (21f932c), closes #​26066

v15.3.2

• [bitnami/postgresql] Release 15.3.2 updating components versions (#​25812) (3f7c2cb), closes #​25812

v15.3.1

• [bitnami/postgresql] Release 15.3.1 updating components versions (#​25723) (031d2cf), closes #​25723

v15.3.0

• [bitnami/postgresql] Allow loadBalancerClass to be customized (#​25569) (e6fecf9), closes #​25569

v15.2.12

• [bitnami/postgresql] Release 15.2.12 updating components versions (#​25678) (0fd1557), closes #​25678

v15.2.11

• [bitnami/postgresql] Release 15.2.11 updating components versions (#​25672) (9b809c6), closes #​25672

v15.2.10

• [bitnami/*] Change non-root and rolling-tags doc URLs (#​25628) (b067c94), closes #​25628
• [bitnami/*] Set new header/owner (#​25558) (8d1dc11), closes #​25558
• [bitnami/postgresql] add backup.cronjob.tolerations options (#​25664) (4a798ec), closes #​25664

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