docs: fix typo in onListening example (#3706)

Author: snitin315

examples/on-listening/README.md

@@ -24,6 +24,6 @@ npx webpack serve --open
 
 ## What Should Happen
 
-1. The script should open `https://localhost:8080/` in your default browser.
+1. The script should open `http://localhost:8080/` in your default browser.
 2. You should see the text on the page itself change to read `Success!`.
 3. Check the terminal output, you should see `Listening on port: 8080` in the output.