Fix regression from previous CL detected with gh action running on a JDK17 target. When no EE values are defined, we need to fall back to 12.1.x and EE8, not 11.

PiperOrigin-RevId: 847221273
Change-Id: Ie88281f98b52ff94eeeaff9943f74aca156bffbb

Author: ludoch

api_dev/src/main/java/com/google/appengine/tools/info/SdkFactory.java

@@ -35,8 +35,8 @@ static AppengineSdk getSdk() {
       currentSdk = new Jetty121EE11Sdk();
     } else {
       // We keep Jetty9 legacy SDK for internal testing only.
-      // For external usage, we default to Jetty12.1 EE11 SDK.
-      currentSdk = new Jetty121EE11Sdk();
+      // For external usage, we default to Jetty12.1 EE8 SDK.
+      currentSdk = new Jetty121EE8Sdk();
     }
     return currentSdk;
   }