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

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

charts/stable/owncast/Chart.yaml

@@ -3,7 +3,7 @@ appVersion: "0.0.10"
 dependencies:
 - name: common
   repository: https://truecharts.org
-  version: 8.14.5
+  version: 8.15.0
 description: Take control over your live stream video by running it yourself. Streaming
   + chat out of the box.
 home: https://github.com/truechartsapps/tree/master/charts/stable/owncast
@@ -22,7 +22,7 @@ name: owncast
 sources:
 - https://owncast.online/
 - https://github.com/owncast/owncast
-version: 4.0.37
+version: 4.0.38
 annotations:
   truecharts.org/catagories: |
     - media