Added Heapsort for C

Author: JMJ2312

README.md

@@ -3029,8 +3029,8 @@ In order to achieve greater coverage and encourage more people to contribute to
         <tr>
             <td><a href="https://en.wikipedia.org/wiki/Heapsort">Heapsort</a></td>
             <td> <!-- C -->
-                <a href="./CONTRIBUTING.md">
-                    <img align="center" height="25" src="./logos/github.svg" />
+                <a href="./src/c/Heapsort.c">
+                    <img align="center" height="25" src="./logos/c.svg" />
                 </a>
             </td>
             <td> <!-- C++ -->