update upernet50 fps

Author: hangzhaomit

README.md

@@ -124,12 +124,12 @@ IMPORTANT: We use our self-trained base model on ImageNet. The model takes the i
     <tr>
         <td rowspan="2"><b>UperNet50</b></td>
         <td>No</td><td>40.44</td><td>79.80</td><td>60.12</td>
-        <td>-</td>
+        <td>8.4</td>
         <td rowspan="2">1.75 * 20 = 35.0</td>
     </tr>
     <tr>
         <td>Yes</td><td>41.55</td><td>80.23</td><td>60.89</td>
-        <td>-</td>
+        <td>2.9</td>
     </tr>
     <tr>
         <td rowspan="2"><b>UperNet101</b></td>