Add LUKS keyboard issue to the known limitations (#156)

Co-authored-by: Timothée Ravier <[email protected]>

modules/ROOT/pages/installation.adoc

@@ -23,6 +23,16 @@ If you are uncertain about this, {variant-name} can also be tested in a virtual
 It is possible to make {variant-name} work for both dual boot and manual partitioning, and some guidance is provided on manual partitioning below.
 However, there are hazards involved in both cases, and you should only attempt to use these features if you have done the necessary research, and are confident that you can overcome any issues that you might encounter.
 
+*The keyboard layout selected during installation is not used for the LUKS unlock screen of {variant-name}.*
+
+Regardless of your selection during the installation process, the keyboard layout available for the LUKS unlock screen will default to `en-US` (English - United States of America).
+You can workaround this issue by running the following command on the first boot after the installation:
+ `rpm-ostree initramfs-etc --track=/etc/vconsole.conf`.
+
+To avoid struggling when having to type the LUKS passphrase for the first time, you could set during installation a disk encryption passphrase that is easy to type with the `en-US` keyboard layout, and then change it to the passphrase that you actually want through the GNOME https://apps.gnome.org/en-GB/app/org.gnome.DiskUtility[Disks] app.
+
+See https://bugzilla.redhat.com/show_bug.cgi?id=1890085[bug #1890085] (Red Hat Bugzilla) and https://github.com/fedora-silverblue/issue-tracker/issues/3[issue #3] (Fedora Silverblue issue tracker) for details.
+
 [[getting-silverblue]]
 == Getting {variant-name}