chore(deps): update mariadb docker tag to v20.4.1

This MR contains the following updates:

Package	Type	Update	Change
mariadb (source)	HelmChart	minor	20.3.1 -> 20.4.1

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Release Notes

bitnami/charts (mariadb)

v20.4.1

• [bitnami/mariadb] hotfix: Fix issue when auth.username is not set and usePasswordFiles=true (#​32161)

v20.4.0

• [bitnami/mariadb] Set usePasswordFiles=true by default (#​32110) (67bee27), closes #​32110

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