Replace placeholder images and update links in index.html

Author: mrafeie

Wireframe/index.html

@@ -16,28 +16,28 @@ <h1>Welcome to Intro to Programming</h1>
         </header>
         <main>
             <article>
-                <img src="placeholder.svg" alt="" />
+                <img src="https://media.geeksforgeeks.org/wp-content/uploads/20240702120959/Readme1.png" alt="Readme image" />
                 <h2>The purpose of a README file</h2>
                 <p>
                     A README file is text file often included with a software
                     program or code package which provides the reader with
                     information they may need to use the software, such
                     installation instructions.
                 </p>
-                 <a href="#">Read more about README files</a>
+                 <a href="https://en.wikipedia.org/wiki/README">Read more about README files</a>
             </article>
             <article>
-                <img src="placeholder.svg" alt="" />
+                <img src="https://support.microsoft.com/images/en-us/ae7333a6-5681-45ea-b482-e0de7c81cabd" alt="Wireframe image" />
                 <h2>The purpose of a wireframe</h2>
                 <p>
                     A wireframe is used to express the layout of a visual medium
                     such as a newspaper, or web page. It helps designers and
                     programmers to get a simple overview of a design.
                 </p>
-                <a href="">Read more about wireframing</a>
+                <a href="https://www.experienceux.co.uk/faqs/what-is-wireframing">Read more about wireframing</a>
             </article>
             <article>
-                <img src="placeholder.svg" alt="" />
+                <img src="https://docs.github.com/assets/cb-2058/mw-1440/images/help/branches/pr-retargeting-diagram1.webp" alt="Branch image" />
                 <h2>What is a Git branch</h2>
                 <p>
                     A git branch is a copy of the code in a git repository.
@@ -47,7 +47,7 @@ <h2>What is a Git branch</h2>
                     successful, for example there are too many bugs, the branch
                     can be deleted without affecting the main branch.
                 </p>
-                <a href="">Read more about Git</a>
+                <a href="https://en.wikipedia.org/wiki/Branching_(version_control)">Read more about Git</a>
             </article>
         </main>
         <footer>