Fix anchor tag self-closing syntax and position in People.tsx

Author: imcsq

src/pages/People.tsx

@@ -225,14 +225,15 @@ export function People(): ReactElement {
           </div>
 
           <div className="banner-bottom-left">
-            <a href="https://congyingxu.github.io/" />
+            <a href="https://congyingxu.github.io/">
             <div className="portrait">
               <img
                 alt=""
                 src="images/congying.jpeg"
                 className="portrait-round"
               />
             </div>
+            </a>
             <h3>
               <a href="https://congyingxu.github.io/">Congying Xu</a>
             </h3>