Update aws.go for issue #3833

Fix to add ap-south-2 region to support elb and nlb

provider/aws/aws.go

@@ -72,6 +72,7 @@ var canonicalHostedZones = map[string]string{
 	"ca-central-1.elb.amazonaws.com":      "ZQSVJUPU6J1EY",
 	"ap-east-1.elb.amazonaws.com":         "Z3DQVH9N71FHZ0",
 	"ap-south-1.elb.amazonaws.com":        "ZP97RAFLXTNZK",
+	"ap-south-2.elb.amazonaws.com":        "Z0173938T07WNTVAEPZN,
 	"ap-northeast-2.elb.amazonaws.com":    "ZWKZPGTI48KDX",
 	"ap-northeast-3.elb.amazonaws.com":    "Z5LXEXXYW11ES",
 	"ap-southeast-1.elb.amazonaws.com":    "Z1LMS91P8CMLE5",
@@ -102,6 +103,7 @@ var canonicalHostedZones = map[string]string{
 	"elb.ca-central-1.amazonaws.com":      "Z2EPGBW3API2WT",
 	"elb.ap-east-1.amazonaws.com":         "Z12Y7K3UBGUAD1",
 	"elb.ap-south-1.amazonaws.com":        "ZVDDRBQ08TROA",
+	"elb.ap-south-2.amazonaws.com":        "Z0711778386UTO08407HT,
 	"elb.ap-northeast-3.amazonaws.com":    "Z1GWIQ4HH19I5X",
 	"elb.ap-northeast-2.amazonaws.com":    "ZIBE1TIR4HY56",
 	"elb.ap-southeast-1.amazonaws.com":    "ZKVM4W9LS7TM",