docs: fix fiddle path (electron#30139)

molant · web-flow · commit a855aa34d939 · 2021-07-14T16:16:59.000-04:00
This is breaking the build in `electron/electronjs.org-new` and will most likely not work when clicking the "Fiddle" button. Rel: electron/website#65
diff --git a/docs/tutorial/launch-app-from-url-in-another-app.md b/docs/tutorial/launch-app-from-url-in-another-app.md
@@ -168,7 +168,7 @@ After you start your electron app, you can now enter in a URL in your browser th
     can leave it empty.
 -->
 
-```fiddle docs/fiddles/system/protocol-handler/launch-app-from-url-in-another-app
+```fiddle docs/fiddles/system/protocol-handler/launch-app-from-URL-in-another-app
 
 ```
 
