Update gen.yaml

Author: ThomasRooney

gen.yaml

@@ -10,7 +10,7 @@ generation:
   auth:
     oAuth2ClientCredentialsEnabled: false
 typescript:
-  version: 4.0.0
+  version: 4.1.0-rc.1
   additionalDependencies:
     dependencies: {}
     devDependencies: {}