Fix Factor 0.97 install by switching to a suite (#44089)

The Factor Listener expects to find factor.image and other files
included in its disk image to be alongside the application.

Switch from a standalone app stanza to a suite so that all required
files are installed.

Casks/factor.rb

@@ -6,9 +6,9 @@ cask 'factor' do
   name 'Factor'
   homepage 'https://factorcode.org/'
 
-  app 'factor/Factor.app'
+  suite 'factor'
 
   caveats do
-    path_environment_variable "#{staged_path}/factor/"
+    path_environment_variable "#{staged_path}/factor"
   end
 end