Update generated code (#1841)

* update generated code

* Apply suggestions from code review

---------

Co-authored-by: Jérémy Derussé <jeremy@derusse.com>

Author: async-aws-bot

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: Added `us-isof-east-1` and `us-isof-south-1` regions
+
 ## 1.5.4
 
 ### Changed

composer.json

@@ -31,7 +31,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "1.5-dev"
+            "dev-master": "1.6-dev"
         }
     }
 }

src/IamClient.php

@@ -581,6 +581,14 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'iam',
                     'signVersions' => ['v4'],
                 ];
+            case 'us-isof-east-1':
+            case 'us-isof-south-1':
+                return [
+                    'endpoint' => 'https://iam.us-isof-south-1.csp.hci.ic.gov',
+                    'signRegion' => 'us-isof-south-1',
+                    'signService' => 'iam',
+                    'signVersions' => ['v4'],
+                ];
             case 'us-isob-east-1':
                 return [
                     'endpoint' => 'https://iam.us-isob-east-1.sc2s.sgov.gov',