doc/go1.22: move go/version package mention into a separate heading
It's a new package in the standard library,
not a minor change to an existing package.
For #62039.
For #61422.
Change-Id: I7488304cd2bd6353f535cab192d015796840ba4e
Reviewed-on: https://go-review.googlesource.com/c/go/+/559799
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com> Reviewed-by: Michael Knyszek <mknyszek@google.com>