Change the TypeScript SDK generator version

Author: jon-fern

fern/apis/api/generators.yml

@@ -28,7 +28,7 @@ groups:
   ts-sdk:
     generators:
       - name: fernapi/fern-typescript-sdk
-        version: 3.9.3
+        version: 2.13.0
         api:
           settings:
             unions: v1