Add 09-std-threads to index (#58)

Author: aobolensk

index.html

@@ -55,6 +55,7 @@ <h1>Parallel Programming Course Slides</h1>
         <li><a href="https://learning-process.github.io/parallel_programming_slides/slides/06-admin-intro-threads.pdf" target="_blank">06: Administrative questions - Threading</a></li>
         <li><a href="https://learning-process.github.io/parallel_programming_slides/slides/07-openmp.pdf" target="_blank">07: OpenMP</a></li>
         <li><a href="https://learning-process.github.io/parallel_programming_slides/slides/08-tbb.pdf" target="_blank">08: TBB</a></li>
+        <li><a href="https://learning-process.github.io/parallel_programming_slides/slides/09-std-threads.pdf" target="_blank">09: std::thread</a></li>
     </ul>
 </body>
 </html>