Update generators.yml

Author: dhruva-reddy

fern/apis/api/generators.yml

@@ -71,8 +71,7 @@ groups:
           repository: VapiAI/server-sdk-ruby
         output:
           location: rubygems
-          package-name: vapi-server-sdk
-          api-key: ${RUBYGEMS_API_KEY}
+          package-name: vapi_server_sdk
         config:
           clientClassName: Vapi
           rubocopVariableNumberStyle: disabled