dirty flakiness fix?

spec/github_pages_health_check/domain_spec.rb

@@ -678,6 +678,7 @@
         # Just truncate the file (without buffering to avoid flakiness)
         file.sync = true
       end
+      sleep(.5) # slow down just a little to limit flakiness too
     end
 
     it "it follows ftp if requested" do