* Handle submodules with SSH URLs
This is just a documentation change, explaining how to fix submodules
that are configured to use SSH URLs instead of HTTPS URLs. Spent a while
banging my head on the wall and hope this saves someone else the pain.
This is helpful for teams that use the SSH protocol for local
development so don't want to change the mechanism that pulls in the
submodules. Using `insteadOf` seems a bit nicer than than setting up a
deploy keypair.
* SSH submodules
Co-authored-by: Chris Patterson <chrispat@github.com>
