feat(clients): update client endpoints as of 2025-12-08

Author: awstools

codegen/smithy-aws-typescript-codegen/src/main/resources/software/amazon/smithy/aws/typescript/codegen/endpoints.json

@@ -21036,6 +21036,11 @@
             }
           }
         },
+        "partnercentral-channel": {
+          "endpoints": {
+            "us-east-1": {}
+          }
+        },
         "personalize": {
           "endpoints": {
             "ap-northeast-1": {},