Update retrofit description to include Jackson as an option

This should have been done as part of in #16853.

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

@@ -239,7 +239,7 @@ public JavaClientCodegen() {
         supportedLibraries.put(JERSEY3, "HTTP client: Jersey client 3.x. JSON processing: Jackson 2.17.1");
         supportedLibraries.put(FEIGN, "HTTP client: OpenFeign 10.x. JSON processing: Jackson 2.17.1 or Gson 2.10.1");
         supportedLibraries.put(OKHTTP_GSON, "[DEFAULT] HTTP client: OkHttp 3.x. JSON processing: Gson 2.10.1. Enable Parcelable models on Android using '-DparcelableModel=true'. Enable gzip request encoding using '-DuseGzipFeature=true'.");
-        supportedLibraries.put(RETROFIT_2, "HTTP client: OkHttp 3.x. JSON processing: Gson 2.10.1 (Retrofit 2.5.0). Enable the RxJava adapter using '-DuseRxJava[2/3]=true'. (RxJava 1.x or 2.x or 3.x)");
+        supportedLibraries.put(RETROFIT_2, "HTTP client: OkHttp 3.x. JSON processing: Gson 2.10.1 (Retrofit 2.5.0) or Jackson 2.17.1. Enable the RxJava adapter using '-DuseRxJava[2/3]=true'. (RxJava 1.x or 2.x or 3.x)");
         supportedLibraries.put(RESTTEMPLATE, "HTTP client: Spring RestTemplate 4.x. JSON processing: Jackson 2.17.1");
         supportedLibraries.put(WEBCLIENT, "HTTP client: Spring WebClient 5.x. JSON processing: Jackson 2.17.1");
         supportedLibraries.put(RESTCLIENT, "HTTP client: Spring RestClient 6.1. JSON processing: Jackson 2.17.1");