KeyError in config due to breaking change in opentelemetry

[ghost]

The config files in this example error out with key errors due to a breaking change in open-telemetry/opentelemetry-collector#4063. As of now the insecure key needs to be nested under tls
ie

exporters:
  otlp:
    endpoint: "{{ with service "otlp.otel-demo-collector" }}{{ with index . 0 }}{{ .Address }}:{{ .Port }}{{ end }}{{ end }}"
    insecure: true

should be

exporters:
  otlp:
    endpoint: "{{ with service "otlp.otel-demo-collector" }}{{ with index . 0 }}{{ .Address }}:{{ .Port }}{{ end }}{{ end }}"
    tls:
      insecure: true

[ghost]

Closing as the fix is merged in