Fix model weights path

Summary:
Update weights path in [previous commit](https://github.com/facebookresearch/d2go/commit/477ab964e2165cb586b5c00425f6e463d7edeadd)
fixes https://github.com/facebookresearch/d2go/issues/108

Pull Request resolved: https://github.com/facebookresearch/d2go/pull/109

Reviewed By: wat3rBro

Differential Revision: D30505672

Pulled By: zhanghang1989

fbshipit-source-id: dc946348549a171a6ce058411be2bfd9fa2dad2c

d2go/model_zoo/model_zoo.py

@@ -16,8 +16,8 @@ class _ModelZooUrls(object):
         "faster_rcnn_fbnetv3a_C4.yaml": "268421013/model_final.pth",
         "faster_rcnn_fbnetv3a_dsmask_C4.yaml": "268412271/model_0499999.pth",
         "faster_rcnn_fbnetv3g_fpn.yaml": "250356938/model_0374999.pth",
-        "mask_rcnn_fbnetv3a_C4.yaml": "250355374/model_0479999.pth",
-        "mask_rcnn_fbnetv3a_dsmask_C4.yaml": "250414867/model_0399999.pth",
+        "mask_rcnn_fbnetv3a_C4.yaml": "268421013/model_final.pth",
+        "mask_rcnn_fbnetv3a_dsmask_C4.yaml": "268412271/model_0499999.pth",
         "mask_rcnn_fbnetv3g_fpn.yaml": "287445123/model_0409999.pth",
         "keypoint_rcnn_fbnetv3a_dsmask_C4.yaml": "250430934/model_0389999.pth",
     }