Update Helm release mariadb to v20

This MR contains the following updates:

Package	Update	Change
mariadb (source)	major	19.1.2 -> 20.0.0

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Release Notes

bitnami/charts (mariadb)

v20.0.0

• [bitnami/mariadb] fix!: 🐛 ✨ 💥 Set correct serviceName and add Password Update Job (#​30300)

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