The "invalid fd IPv6 bind address" table entry binds [::1]:0 but was
missing ipv6: true, so skipDevContainer never ran for it and the test
failed with "bind: cannot assign requested address" under DEVCONTAINER=1
on hosts without IPv6. Mark it ipv6 like its sibling "valid fd IPv6 bind
address" entry so the guard skips it.
Signed-off-by: Mateen Anjum <mateenali66@gmail.com>