Attempt to fix broken JS tests

Author: craigfowler

CSF.Screenplay.JsonToHtmlReport.Template/src/jest.config.js

@@ -5,7 +5,7 @@ const config = {
   coverageDirectory: "TestResults",
   testEnvironment: 'jsdom',
   testEnvironmentOptions: {
-    url: 'http://localhost',
+    url: 'http://localhost/',
   },
 };