Update docs on upstream EPEL7 pygit2/libgit2 issues (#39421)
Update docs on upstream EPEL7 pygit2/libgit2 issues (#39421)

pygit2 was rebuilt, but libgit2 still needs a rebuild. I opened an
upstream bug report this morning, this updates the docs to reflect the
current status of this upstream issue.
saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt