fix(container): update image docker.io/jmalloc/echo-server to v0.3.7

[renovate]

This PR contains the following updates:

Package	Update	Change
docker.io/jmalloc/echo-server	patch	0.3.6 → v0.3.7

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[github-actions]

--- kubernetes/apps/networking/echo-server/app Kustomization: flux-system/cluster-apps-echo-server HelmRelease: networking/echo-server

+++ kubernetes/apps/networking/echo-server/app Kustomization: flux-system/cluster-apps-echo-server HelmRelease: networking/echo-server

@@ -29,13 +29,13 @@

       retries: 3
   values:
     controller:
       strategy: RollingUpdate
     image:
       repository: docker.io/jmalloc/echo-server
-      tag: 0.3.6
+      tag: v0.3.7
     ingress:
       main:
         annotations:
           external-dns.alpha.kubernetes.io/target: external.${SECRET_DOMAIN}
           hajimari.io/icon: video-input-antenna
         enabled: true

[github-actions]

--- HelmRelease: networking/echo-server Deployment: networking/echo-server

+++ HelmRelease: networking/echo-server Deployment: networking/echo-server

@@ -25,13 +25,13 @@

       serviceAccountName: default
       automountServiceAccountToken: true
       dnsPolicy: ClusterFirst
       enableServiceLinks: true
       containers:
       - name: echo-server
-        image: docker.io/jmalloc/echo-server:0.3.6
+        image: docker.io/jmalloc/echo-server:v0.3.7
         imagePullPolicy: null
         ports:
         - name: http
           containerPort: 8080
           protocol: TCP
         livenessProbe: