[skip-ci] Bump docker image tag (#60988)
Summary:
This PR bumps the docker image tag for clang-tidy. The new image runs ubuntu-20.04 (and therefore has python3.8 by default).
Pull Request resolved: https://github.com/pytorch/pytorch/pull/60988
Reviewed By: malfet
Differential Revision: D29469941
Pulled By: 1ntEgr8
fbshipit-source-id: 7268bdb23edff0bc26f275689bf4b1f1ca129df7
