fix: cluster secret template, insecure should be a boolean

Author: 4ch3los

cmd/template/cluster-secret.yaml

@@ -59,7 +59,7 @@ data:
       certData: "{{ base64 .KubeConfig.TLSClientConfig.CertData }}"
       {{ end }}
       # Server should be accessed without verifying the TLS certificate
-      insecure: "{{ .KubeConfig.TLSClientConfig.Insecure }}"
+      insecure: {{ .KubeConfig.TLSClientConfig.Insecure }}
       {{ if .KubeConfig.TLSClientConfig.KeyData }}
       # Base64 encoded PEM-encoded bytes (typically read from a client certificate key file).
       keyData: "{{ base64 .KubeConfig.TLSClientConfig.KeyData }}"