vi(1): Add URL to the vi/ex reference manual in the man page
Reported in PR 241985
The manual page references the "vi/ex reference manual" but there is no
information about where to find that document. Add a reference to the manual in
the SEE ALSO section since the Project hosts a copy of it[1].
Change sent upstream[2]
If D26158 gets reviewed and committed, we could close that PR.