Update chrome.md with alert and prompt explanations

Clarify the effects and return values of alert and prompt functions.

Author: cywong-dev

Sprint-1/4-stretch-explore/chrome.md

@@ -12,7 +12,14 @@ invoke the function `alert` with an input string of `"Hello world!"`;
 
 What effect does calling the `alert` function have?
 
+[ChunYanWong] Display an alert or message box in the browser with the message "Hello world!"
+
 Now try invoking the function `prompt` with a string input of `"What is your name?"` - store the return value of your call to `prompt` in an variable called `myName`.
 
 What effect does calling the `prompt` function have?
+
+[ChunYanWong] Display an input box to capture the user input
+
 What is the return value of `prompt`?
+
+[ChunYanWobg] Inputted name