chore(renovate): Update Helm release mariadb to v21

Author: renovate[bot]

helm-subcharts/mariadb/Chart.yaml

@@ -7,5 +7,5 @@ appVersion: '11.0.14'
 
 dependencies:
   - name: mariadb
-    version: 14.1.4
+    version: 21.0.3
     repository: https://charts.bitnami.com/bitnami