pin torchvision to 0.15

Summary: 0.16 forces torch 2.1.2 to be installed, when we eventually want to test against pytorch 2.0.0. Ideally we remove this dev dependency all together but for now this is a quick fix, as 0.15 relies on torch 2.0.1

Reviewed By: galrotem

Differential Revision: D56531173

fbshipit-source-id: 9931ad6fbcb584879186e8a4e91364f171b20f15

Author: JKSenthil

dev-requirements.txt

@@ -3,4 +3,4 @@ pytest
 pytest-cov
 torchsnapshot@git+https://github.com/pytorch/torchsnapshot@main
 pyre-check
-torchvision==0.16.2
+torchvision==0.15.2