Update README.md

Author: WongKinYiu

README.md

@@ -52,7 +52,7 @@ Developing...
 | **YOLOR-P6** | 1280 | **54.1%** | **71.8%** | **59.3%** | **36.2%** | **58.1%** | **65.8%** | 49 *fps* |
 | **YOLOR-W6** | 1280 | **55.5%** | **73.2%** | **60.6%** | **37.6%** | **59.5%** | **67.7%** | 47 *fps* |
 | **YOLOR-E6** | 1280 | **56.4%** | **74.1%** | **61.6%** | **39.1%** | **60.1%** | **68.2%** | 37 *fps* |
-| **YOLOR-D6** | 1280 | **57.0%** | **74.7%** | **62.2%** | **39.7%** | **60.6%** | **69.0%** | 30 *fps* |
+| **YOLOR-D6** | 1280 | **57.3%** | **75.0%** | **62.7%** | **40.4%** | **61.2%** | **69.2%** | 30 *fps* |
 |  |  |  |  |  |  |  |
 
 ## Installation