Align documentation

Author: Mattias-Sehlstedt

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/JavaClientCodegen.java

@@ -259,7 +259,7 @@ public JavaClientCodegen() {
         cliOptions.add(CliOption.newBoolean(USE_ENUM_CASE_INSENSITIVE, "Use `equalsIgnoreCase` when String for enum comparison", useEnumCaseInsensitive));
         cliOptions.add(CliOption.newBoolean(FAIL_ON_UNKNOWN_PROPERTIES, "Fail Jackson de-serialization on unknown properties", this.failOnUnknownProperties));
         cliOptions.add(CliOption.newBoolean(SUPPORT_VERTX_FUTURE, "Also generate api methods that return a vertx Future instead of taking a callback. Only `vertx` supports this option. Requires vertx 4 or greater.", this.supportVertxFuture));
-        cliOptions.add(CliOption.newBoolean(USE_SEALED_ONE_OF_INTERFACES, "Generate the oneOf interfaces as sealed interfaces", this.useSealedOneOfInterfaces));
+        cliOptions.add(CliOption.newBoolean(USE_SEALED_ONE_OF_INTERFACES, "Generate the oneOf interfaces as sealed. Only supported for WebClient and RestClient.", this.useSealedOneOfInterfaces));
 
         supportedLibraries.put(JERSEY2, "HTTP client: Jersey client 2.25.1. JSON processing: Jackson 2.17.1");
         supportedLibraries.put(JERSEY3, "HTTP client: Jersey client 3.1.1. JSON processing: Jackson 2.17.1");