feat(client-security-ir): Increase minimum length of Threat Actor IP 'userAgent' to 1.

Author: awstools

codegen/sdk-codegen/aws-models/security-ir.json

@@ -4932,7 +4932,7 @@
       "type": "string",
       "traits": {
         "smithy.api#length": {
-          "min": 0,
+          "min": 1,
           "max": 500
         }
       }