Fix documentation of a parameter for a Varnish controller method.

pkg/varnish/varnish.go

@@ -658,6 +658,7 @@ func (vc *Controller) updateBeGauges() {
 //
 //	svcKey: namespace/name key for the Service
 //	spec: VCL spec corresponding to the configuration
+//	addrs: addresses of the Varnish service instances
 //	ingsMeta: Ingress meta-data
 //	vcfgMeta: VarnishConfig meta-data
 //	bcfgMeta: BackendConfig meta-data