Fix env variable name

Author: 01jongmin

fastlane/Fastfile

@@ -45,7 +45,7 @@ platform :ios do
   end
 
   lane :ci_beta do
-    ENV["FASTLANE_XCODE_LIST_TIMEOUT"] = "120"
+    ENV["FASTLANE_XCODEBUILD_SETTINGS_TIMEOUT"] = "120"
     increment_build_number({
       build_number: latest_testflight_build_number(api_key_path: "api_key.json", app_identifier: "org.pennlabs.PennMobile") + 1
     })