Use unique images for each article

Author: khaliun-dev

Wireframe/git-branch.jpg

@@ -16,8 +16,8 @@ <h1>Web Development Essentials</h1>
     <main>
       <article>
         <img
-          src="placeholder.svg"
-          alt="Illustration representing a README file"
+          src="readme.jpg" 
+          alt="Example README file"
         />
 
         <h2>What is a README File?</h2>
@@ -39,8 +39,8 @@ <h2>What is a README File?</h2>
 
       <article>
         <img
-          src="placeholder.svg"
-          alt="Illustration representing a wireframe"
+          src="wireframe.jpg" 
+          alt="Website wireframe layout"
         />
 
         <h2>What is a Wireframe?</h2>
@@ -62,8 +62,8 @@ <h2>What is a Wireframe?</h2>
 
       <article>
         <img
-          src="placeholder.svg"
-          alt="Illustration representing Git branches"
+          src="git-branch.jpg" 
+          alt="Git branching diagram"
         />
 
         <h2>What is a Git Branch?</h2>