update coco.yaml

data/coco.yaml

@@ -10,7 +10,7 @@
 # train and val data as 1) directory: path/images/, 2) file: path/images.txt, or 3) list: [path1/images/, path2/images/]
 train: ../coco/train2017.txt  # 118287 images
 val: ../coco/val2017.txt  # 5000 images
-test: ../coco/test-dev2017.txt  # 40670 images for submission to https://competitions.codalab.org/competitions/20794
+test: ../coco/test-dev2017.txt  # 20288 of 40670 images for submission to https://competitions.codalab.org/competitions/20794
 
 # number of classes
 nc: 80