chore(deps): update docker.io/alpine/helm docker tag to v3.15.1 (#691)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| docker.io/alpine/helm | stage | minor | `3.14.4` -> `3.15.1` |

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.devcontainer/Dockerfile

@@ -15,7 +15,7 @@ RUN apt-get update --fix-missing && \
 COPY --from=docker.io/bitnami/kubectl:1.30.1            /opt/bitnami/kubectl/bin/kubectl /usr/local/bin/kubectl
 COPY --from=registry.k8s.io/kustomize/kustomize:v5.4.2  /app/kustomize                   /usr/local/bin/kustomize
 COPY --from=ghcr.io/kyverno/kyverno-cli:v1.12.2         /ko-app/kubectl-kyverno          /usr/local/bin/kyverno
-COPY --from=docker.io/alpine/helm:3.14.4                /usr/bin/helm                    /usr/local/bin/helm
+COPY --from=docker.io/alpine/helm:3.15.1                /usr/bin/helm                    /usr/local/bin/helm
 COPY --from=ghcr.io/fluxcd/flux-cli:v2.3.0              /usr/local/bin/flux              /usr/local/bin/flux
 
 COPY requirements_dev.txt /src/

Dockerfile

@@ -10,7 +10,7 @@ COPY setup.cfg .
 RUN pip install -e .
 
 COPY --from=ghcr.io/fluxcd/flux-cli:v2.3.0              /usr/local/bin/flux              /usr/local/bin/flux
-COPY --from=docker.io/alpine/helm:3.14.4                /usr/bin/helm                    /usr/local/bin/helm
+COPY --from=docker.io/alpine/helm:3.15.1                /usr/bin/helm                    /usr/local/bin/helm
 COPY --from=docker.io/bitnami/kubectl:1.30.1            /opt/bitnami/kubectl/bin/kubectl /usr/local/bin/kubectl
 COPY --from=registry.k8s.io/kustomize/kustomize:v5.4.2  /app/kustomize                   /usr/local/bin/kustomize
 COPY --from=ghcr.io/kyverno/kyverno-cli:v1.12.2         /ko-app/kubectl-kyverno          /usr/local/bin/kyverno