FIX: If we want a .json path, don't bootstrap (#12772)

app/assets/javascripts/discourse/lib/bootstrap-json/index.js

@@ -237,6 +237,10 @@ module.exports = {
       return false;
     }
 
+    if (req.path.endsWith(".json")) {
+      return false;
+    }
+
     let baseURL =
       options.rootURL === ""
         ? "/"