upload flow4d_best weight and fixed gt in demo data.

Check pull request:

- https://github.com/KTH-RPL/OpenSceneFlow/pull/1
- https://github.com/KTH-RPL/OpenSceneFlow/pull/5

demo_data.zip

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:2038df81fad8a78975eff20604c4a90dd267ab37f5cebe03d717e77f08ffd5ca
-size 612729967
+oid sha256:c538db3efc4aca41deecf8243abefa3853b21bce02bb7f663ffde616b746ddab
+size 617228498

flow4d_best.ckpt

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:afe2f5fa3925b85850c917769c7582c3c733776c4ed8cefe29399df219bbb9b4
+size 55713474