Fix jit doc codeblocks and tables (#15227)
Summary:
Some of the codeblocks were showing up as normal text and the "unsupported modules" table was formatted incorrectly
Pull Request resolved: https://github.com/pytorch/pytorch/pull/15227
Differential Revision: D13468847
Pulled By: driazati
fbshipit-source-id: eb7375710d4f6eca1d0f44dfc43c7c506300cb1e
