Add a page for wifi to document firmwares removal

Some wifi-firmwares will be split into sub-packages in fedora 40
We will keep them in until fedora 41, but display a warning message
in the console. This messages links to this FAQ entry.

See  coreos/fedora-coreos-config#2963
See  coreos/fedora-coreos-tracker#1575

modules/ROOT/nav.adoc

@@ -43,6 +43,7 @@
 ** xref:time-zone.adoc[Configuring Time Zone]
 ** xref:grub-password.adoc[Setting a GRUB password]
 ** xref:audit.adoc[Managing the audit daemon]
+** xref:wifi.adoc[Wi-Fi Network configuration]
 * OS updates
 ** xref:update-streams.adoc[Update Streams]
 ** xref:auto-updates.adoc[Auto-Updates]