feat(clients): update client endpoints as of 2025-04-17

Author: awstools

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

@@ -43961,6 +43961,11 @@
             "us-isob-east-1": {}
           }
         },
+        "fsx": {
+          "endpoints": {
+            "us-isob-east-1": {}
+          }
+        },
         "glacier": {
           "endpoints": {
             "fips-us-isob-east-1": {