deps: update dependency helm/helm to v3.15.4

Author: renovate[bot]

.github/workflows/test_e2e.yml

@@ -52,7 +52,7 @@ jobs:
             helm
             kubectl
             skaffold
-          helm: v3.15.3 # renovate: datasource=github-releases depName=helm/helm
+          helm: v3.15.4 # renovate: datasource=github-releases depName=helm/helm
           kubectl: v1.31.0 # renovate: datasource=github-releases depName=kubernetes/kubernetes
           skaffold: v2.13.1 # renovate: datasource=github-releases depName=GoogleContainerTools/skaffold
 
@@ -159,7 +159,7 @@ jobs:
             helm
             kubectl
             skaffold
-          helm: v3.15.3 # renovate: datasource=github-releases depName=helm/helm
+          helm: v3.15.4 # renovate: datasource=github-releases depName=helm/helm
           kubectl: v1.31.0 # renovate: datasource=github-releases depName=kubernetes/kubernetes
           skaffold: v2.13.1 # renovate: datasource=github-releases depName=GoogleContainerTools/skaffold