Update endpoints model

Author: aws-sdk-python-automation

awscli/botocore/data/endpoints.json

@@ -16416,6 +16416,7 @@
           "ap-southeast-1" : { },
           "ap-southeast-2" : { },
           "ap-southeast-4" : { },
+          "ap-southeast-5" : { },
           "ca-central-1" : { },
           "eu-central-1" : { },
           "eu-north-1" : { },