chore(deps): update helm chart common to v8.15.0 (#1859)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

charts/stable/icinga2/Chart.yaml

@@ -3,7 +3,7 @@ appVersion: "2.13.1"
 dependencies:
 - name: common
   repository: https://truecharts.org
-  version: 8.14.5
+  version: 8.15.0
 - condition: mariadb.enabled
   name: mariadb
   repository: https://truecharts.org/
@@ -23,7 +23,7 @@ name: icinga2
 sources:
 - https://github.com/jjethwa/icinga2
 - https://icinga.com/
-version: 0.0.27
+version: 0.0.28
 annotations:
   truecharts.org/catagories: |
     - monitoring