Switch to ruby-shadow-ruby32 to work around building issues with newer rubies

apalmblad/ruby-shadow#31

Signed-off-by: Lance Albertson <lance@osuosl.org>

Author: ramereth

Gemfile

@@ -55,7 +55,8 @@ end
 # Everything except AIX and Windows
 group(:ruby_shadow) do
   install_if -> { !RUBY_PLATFORM.match?(/mingw/) } do
-    gem "ruby-shadow", platforms: :ruby
+    # TODO: Temporary workaround for building on Ruby 3.2 and newer
+    gem "ruby-shadow-ruby32", platforms: :ruby
   end
 end