go.mod: ignore cyclic dependency for tagging
go.mod: ignore cyclic dependency for tagging

Another followup to CL 439295, sorry. I forgot x/mod is also a problem,
just via a longer path.

For golang/go#48523.

Change-Id: I0e1685bedc0747f8a939cd650d603910450c61d6
Reviewed-on: https://go-review.googlesource.com/c/text/+/442518
Auto-Submit: Heschi Kreinick <e89ab2b172855aa0ad01c40c4d8a3535a61ac68a@google.com>
Reviewed-by: Bryan Mills <1c8aad60184261ccede67f5c63a0d2a3bf3c9ff4@google.com>
Run-TryBot: Heschi Kreinick <e89ab2b172855aa0ad01c40c4d8a3535a61ac68a@google.com>
TryBot-Result: Gopher Robot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>

golang/text