Models *.yaml reformat (#3875)

models/yolov5s.yaml

@@ -1,9 +1,7 @@
-# parameters
+# Parameters
 nc: 80  # number of classes
 depth_multiple: 0.33  # model depth multiple
 width_multiple: 0.50  # layer channel multiple
-
-# anchors
 anchors:
   - [10,13, 16,30, 33,23]  # P3/8
   - [30,61, 62,45, 59,119]  # P4/16