Update Helm release mariadb to v18.2.1

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
mariadb (source)	patch	18.2.0 -> 18.2.1

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Release Notes

bitnami/charts (mariadb)

### [`v18.2.1`](https://togithub.com/bitnami/charts/blob/HEAD/bitnami/mariadb/CHANGELOG.md#1821-2024-06-04) - \[bitnami/mariadb] Bump chart version ([#​26644](https://togithub.com/bitnami/charts/pull/26644))

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