fix: fix metrics service selector (#24)

Author: taraspos

charts/eks-pod-identity-agent/templates/metrics.yaml

@@ -12,7 +12,7 @@ metadata:
   {{- end }}
 spec:
   selector:
-    app: eks-pod-identiy-agent
+    {{- include "eks-pod-identity-agent.selectorLabels" . | nindent 4 }}
   ports:
     - name: metrics
       port: {{ .Values.metrics.port }}