feat: update AWS service endpoints metadata

Author: aws-sdk-kotlin-ci

codegen/aws-sdk-codegen/src/main/resources/aws/sdk/kotlin/codegen/endpoints.json

@@ -37982,6 +37982,11 @@
           "us-isob-east-1" : { }
         }
       },
+      "fsx" : {
+        "endpoints" : {
+          "us-isob-east-1" : { }
+        }
+      },
       "glacier" : {
         "endpoints" : {
           "fips-us-isob-east-1" : {