adding the path to the unique image for the readme diagram and also proving the alt message for accessiblity compliance

Author: Tobias-Amaechina

Wireframe/index.html

@@ -16,7 +16,7 @@ <h1>Wireframe</h1>
     </header>
     <main>
       <article>
-        <img src="placeholder.svg" alt="" />
+        <img src="Readme.png"" alt="A readme diagram" />
         <h2>What is the Purpose of a Readme File?</h2>
         <p>
           The purpose of a readme file is to provide,