Update README.md

README.md

@@ -50,8 +50,8 @@ Directory Structure
 <div align=right>
 <table>
   <tr>
-    <td><img src="https://github.com/zhm-real/path-planning-algorithms/blob/master/Search_based_Planning/gif/AStar.gif" alt="astar" width="400"/></a></td>
-    <td><img src="https://github.com/zhm-real/path-planning-algorithms/blob/master/Search_based_Planning/gif/Bi-AStar.gif" alt="biastar" width="400"/></a></td>
+    <td><img src="https://github.com/zhm-real/path-planning-algorithms/blob/master/Search_based_Planning/gif/Astar.gif" alt="astar" width="400"/></a></td>
+    <td><img src="https://github.com/zhm-real/path-planning-algorithms/blob/master/Search_based_Planning/gif/Bi-Astar.gif" alt="biastar" width="400"/></a></td>
   </tr>
 </table>
 <table>