chore: upgrade java generator to 2.3.1 (#108)

Author: fern-support

fern/generators.yml

@@ -54,7 +54,7 @@ groups:
   java-sdk:
     generators:
       - name: fernapi/fern-java-sdk
-        version: 2.3.0
+        version: 2.3.1
         publish-metadata:
           author: "SSOReady"
           email: "[email protected]"