update dedup comment in ipam

Author: nihanMicrosoft

azure-ipam/ipam.go

@@ -146,8 +146,7 @@ func (p *IPAMPlugin) CmdAdd(args *cniSkel.CmdArgs) error {
 	for _, podIPInfo := range resp.PodIPInfo {
 		// Skip if interface already seen
 		// This is to avoid duplicate interfaces in the result
-		// which can happen if multiple IPs are assigned to the same interface
-		// or if multiple interfaces are assigned to the same pod
+		// Deduplication is necessary because there is one podIPInfo entry for each IP family(IPv4 and IPv6), and both may point to the same interface or if multiple interfaces are assigned to the same pod
 		if podIPInfo.MacAddress == "" || seenInterfaces[podIPInfo.MacAddress] {
 			continue
 		}