chore(deps): update postgresql docker tag to v18

[renovate]

This PR contains the following updates:

Package	Update	Change
postgresql (source)	major	16.7.10 → 18.7.3

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Release Notes

bitnami/charts (postgresql)

v16.7.27

• [bitnami/postgresql] ⚡ ⬆️ Update dependency references (#​36195) (36f8598), closes #​36195

v16.7.26

• [bitnami/postgresql] ⚡ ⬆️ Update dependency references (#​35921) (e564f07), closes #​35921

v16.7.24

• [bitnami/postgresql] Remove hardcoded references to image repository (#​35694) (bc094f7), closes #​35694

v16.7.21

• [bitnami/postgresql] ⚡ ⬆️ Update dependency references (#​35235) (e3f9cac), closes #​35235

v16.7.20

• [bitnami/*] Adapt main README and change ascii (#​35173) (73d15e0), closes #​35173
• [bitnami/*] Adapt welcome message to BSI (#​35170) (e1c8146), closes #​35170
• [bitnami/*] Add BSI to charts' READMEs (#​35174) (4973fd0), closes #​35174
• [bitnami/postgresql] Rename backup.cronjob.timeZone to backup.cronjob.timezone (#​35153) (8a2dca9), closes #​35153

v16.7.19

• [bitnami/postgresql] ⚡ ⬆️ Update dependency references (#​35116) (15c6eee), closes #​35116

v16.7.18

• [bitnami/postgresql] ⚡ ⬆️ Update dependency references (#​35031) (57712c4), closes #​35031

v16.7.17

• [bitnami/postgresql] ⚡ ⬆️ Update dependency references (#​35012) (b57f28f), closes #​35012

v16.7.16

• [bitnami/postgresql] ⚡ ⬆️ Update dependency references (#​34943) (c3ac2ad), closes #​34943

v16.7.15

• [bitnami/postgresql] ⚡ ⬆️ Update dependency references (#​34741) (d71b40e), closes #​34741

v16.7.14

• [bitnami/postgresql] Update dependencies (#​34650) (25dc474), closes #​34650

v16.7.13

• [bitnami/postgresql] Fix invalid template reference in postgresql update-password job (#​34527) (6ee27f5), closes #​34527

v16.7.12

• [bitnami/postgresql] ⚡ ⬆️ Update dependency references (#​34377) (858195b), closes #​34377

v16.7.11

• [bitnami/postgresql] ⚡ ⬆️ Update dependency references (#​34353) (ea1c058), closes #​34353
• Fix incorrect value paths in password update job documentation (#​34057) (8e61c28), closes #​34057

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