fix: e2e/Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-ALPINE315-ZLIB-2976173
- https://snyk.io/vuln/SNYK-ALPINE315-OPENSSL-3314622
- https://snyk.io/vuln/SNYK-ALPINE315-OPENSSL-3314629
- https://snyk.io/vuln/SNYK-ALPINE315-OPENSSL-3368753
- https://snyk.io/vuln/SNYK-ALPINE315-ZLIB-2434420

e2e/Dockerfile

@@ -10,7 +10,7 @@ RUN wget -q https://storage.googleapis.com/kubernetes-release/release/${KUBECTL_
     wget -q https://get.helm.sh/helm-${HELM_VERSION}-linux-amd64.tar.gz -O - | tar -xzO linux-amd64/helm > /usr/local/bin/helm && \
     chmod +x /usr/local/bin/helm
 
-FROM alpine:3.15.0
+FROM alpine:3.19.4
 RUN apk add -U --no-cache \
     ca-certificates \
     bash \