Increase the prec of test_baddbmm (#34764)
Summary:
This test is flaky on my computer, the error is:
```
AssertionError: tensor(1.3351e-05) not less than or equal to 1e-05
```
Pull Request resolved: https://github.com/pytorch/pytorch/pull/34764
Differential Revision: D20476006
Pulled By: ezyang
fbshipit-source-id: dad7e702275346070552c8a98765c37e6ca2c197
