chore(deps): update mariadb docker tag to v21

This MR contains the following updates:

Package	Type	Update	Change
mariadb (source)	HelmChart	major	20.4.3 -> 21.0.1

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⚠️ Warning

Some dependencies could not be looked up. Check the warning logs for more information.

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Release Notes

bitnami/charts (mariadb)

v21.0.1

• [bitnami/mariadb] ⚡ ⬆ Update dependency references (#​34713)

v21.0.0

• [bitnami/mariadb] ⚡ ⬆ Update dependency references (#​34620) (424716e), closes #​34620

v20.5.9

• [bitnami/mariadb] ⚡ ⬆ Update dependency references (#​34473) (b3f22f2), closes #​34473

v20.5.8

• [bitnami/mariadb] ⚡ ⬆ Update dependency references (#​34336) (cd273c8), closes #​34336

v20.5.7

• [bitnami/mariadb] ⚡ ⬆ Update dependency references (#​34201) (583943d), closes #​34201

v20.5.6

• [bitnami/kubeapps] Deprecation followup (#​33579) (77e312c), closes #​33579
• [bitnami/mariadb] ⚡ ⬆ Update dependency references (#​33856) (1af172a), closes #​33856

v20.5.5

• [bitnami/mariadb] ⚡ ⬆ Update dependency references (#​33554) (018ee9e), closes #​33554

v20.5.4

• [bitnami/mariadb] chore: ♻ ⬆ Update common and remove k8s < 1.23 references (#​33393 (a6d3726), closes #​33393

v20.5.3

• [bitnami/mariadb] adds spec.terminationGracePeriodSeconds to mariadb (#​33168) (22790f0), closes #​33168

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