chore(deps): update helm chart common to v8.15.0 (#1858)

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

charts/dependency/promtail/Chart.yaml

@@ -3,7 +3,7 @@ appVersion: "2.4.2"
 dependencies:
 - name: common
   repository: https://truecharts.org
-  version: 8.14.5
+  version: 8.15.0
 deprecated: false
 description: Promtail is an agent which ships the contents of local logs to a Loki instance
 icon: https://raw.githubusercontent.com/grafana/loki/master/docs/sources/logo.png
@@ -22,7 +22,7 @@ sources:
   - https://grafana.com/oss/loki/
   - https://grafana.com/docs/loki/latest/
 type: application
-version: 1.0.30
+version: 1.0.31
 annotations:
   truecharts.org/catagories: |
     - metrics