Update github links

Author: computron

index.html

@@ -248,7 +248,7 @@ <h4>Rishi Kumar</h4>
                         <h4>Hrushikesh Sahasrabuddhe</h4>
                         <p class="text-muted">Graduate Student Researcher<br />Materials machine learning</p>
                         <ul class="list-inline social-buttons">
-                            <li><a href="https://github.com/chenxin0210"><i class="fa fa-github-alt"></i></a>
+                            <li><a href="https://github.com/hrushikesh-s"><i class="fa fa-github-alt"></i></a>
                             </li>
                             <li><a href="https://scholar.google.com/citations?user=Ukq_tbUAAAAJ&hl=en"><i class="fa fa-graduation-cap"></i></a>
                             </li>
@@ -277,7 +277,7 @@ <h4>Viktoriia Baibakova</h4>
                         <h4>Xin Chen</h4>
                         <p class="text-muted">Graduate Student Researcher<br />Image analysis</p>
                         <ul class="list-inline social-buttons">
-                            <li><a href="https://github.com/chenxin0210"><i class="fa fa-github-alt"></i></a>
+                            <li><a href="https://github.com/X-Chen97"><i class="fa fa-github-alt"></i></a>
                             </li>
                             <li><a href="https://scholar.google.com/citations?hl=en&user=jsF7U6IAAAAJ"><i class="fa fa-graduation-cap"></i></a>
                             </li>