write the heading of the first article 'readme file' on the h2 element

Author: Tobias-Amaechina

Wireframe/index.html

@@ -17,7 +17,7 @@ <h1>Wireframe</h1>
     <main>
       <article>
         <img src="placeholder.svg" alt="" />
-        <h2>Purpose of Readme File</h2>
+        <h2>What is the Purpose of a Readme File?</h2>
         <p>
           Lorem ipsum dolor sit amet consectetur adipisicing elit. Quisquam,
           voluptates. Quisquam, voluptates.