nil webrick test

spec/github-pages/integration_spec.rb

@@ -309,4 +309,10 @@ RSpec.describe "Pages Gem Integration spec" do
       expect(contents).to match("markdown: CommonMarkGhPages")
     end
   end
+
+  context "webrick" do
+    it "does nothing" do
+      # all is well
+    end
+  end
 end