Add m6in, r6idn, r6in instance classes (#592)

Author: wata727

rules/aws_db_instance_invalid_type.go

@@ -106,6 +106,15 @@ func NewAwsDBInstanceInvalidTypeRule() *AwsDBInstanceInvalidTypeRule {
 			"db.m6idn.16xlarge":         true,
 			"db.m6idn.24xlarge":         true,
 			"db.m6idn.32xlarge":         true,
+			"db.m6in.32xlarge":          true,
+			"db.m6in.24xlarge":          true,
+			"db.m6in.16xlarge":          true,
+			"db.m6in.12xlarge":          true,
+			"db.m6in.8xlarge":           true,
+			"db.m6in.4xlarge":           true,
+			"db.m6in.2xlarge":           true,
+			"db.m6in.xlarge":            true,
+			"db.m6in.large":             true,
 			"db.m7g.16xlarge":           true,
 			"db.m7g.12xlarge":           true,
 			"db.m7g.8xlarge":            true,
@@ -210,6 +219,24 @@ func NewAwsDBInstanceInvalidTypeRule() *AwsDBInstanceInvalidTypeRule {
 			"db.r6id.2xlarge":           true,
 			"db.r6id.xlarge":            true,
 			"db.r6id.large":             true,
+			"db.r6idn.32xlarge":         true,
+			"db.r6idn.24xlarge":         true,
+			"db.r6idn.16xlarge":         true,
+			"db.r6idn.12xlarge":         true,
+			"db.r6idn.8xlarge":          true,
+			"db.r6idn.4xlarge":          true,
+			"db.r6idn.2xlarge":          true,
+			"db.r6idn.xlarge":           true,
+			"db.r6idn.large":            true,
+			"db.r6in.32xlarge":          true,
+			"db.r6in.24xlarge":          true,
+			"db.r6in.16xlarge":          true,
+			"db.r6in.12xlarge":          true,
+			"db.r6in.8xlarge":           true,
+			"db.r6in.4xlarge":           true,
+			"db.r6in.2xlarge":           true,
+			"db.r6in.xlarge":            true,
+			"db.r6in.large":             true,
 			"db.r7g.16xlarge":           true,
 			"db.r7g.12xlarge":           true,
 			"db.r7g.8xlarge":            true,