chore(deps): update helm release postgresql to v15

Author: renovate[bot]

charts/metabase/Chart.yaml

@@ -34,6 +34,6 @@ dependencies:
     version: 1.5.21
     repository: https://inseefrlab.github.io/helm-charts-interactive-services
   - name: postgresql
-    version: 11.6.15
+    version: 15.5.1
     repository:  https://charts.bitnami.com/bitnami
     enabled: true

charts/redash/Chart.yaml

@@ -35,7 +35,7 @@ dependencies:
     version: 3.0.0
     repository:  https://getredash.github.io/contrib-helm-chart/
   - name: postgresql
-    version: 11.6.15
+    version: 15.5.1
     repository:  https://charts.bitnami.com/bitnami
   - name: library-chart
     version: 1.5.19