iwlwifi.4: add link to bugzilla in the BUGS section

Given iwlwifi has a (hopefully) fully categorized bug-set under one
meta-bug (tracking) we can give a link to that.

Suggested by:	grahamperrin (as part of a large GH pull request)
Suggested by:	ziaee (final markup)
Sponosred by:	The FreeBSD Foundation
Reviewed by:	ziaee
Pull Request:	https://github.com/freebsd/freebsd-src/pull/1541

share/man/man4/iwlwifi.4

@@ -27,7 +27,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd June 13, 2025
+.Dd August 19, 2025
 .Dt IWLWIFI 4
 .Os
 .Sh NAME
@@ -331,7 +331,7 @@ driver first appeared in
 802.11n and 802.11ac support for the 22000 and later chipsets first appeared in
 .Fx 14.3 .
 .Sh BUGS
-Certainly.
+.Lk https://bugs.freebsd.org/bugzilla/showdependencytree.cgi?id=iwlwifi "iwlwifi known bugs"
 .Pp
 While
 .Nm