Remove cuda 11.6 from nightly (#93979)
Remove cuda 11.6 from CI replace with 11.7
Following the Release readme here: https://github.com/pytorch/pytorch/blob/master/RELEASE.md#release-compatibility-matrix
Pull Request resolved: https://github.com/pytorch/pytorch/pull/93979
Approved by: https://github.com/Skylion007, https://github.com/clee2000, https://github.com/malfet
