manuals: add missing references to classes

Sometimes fixing line length in modified paragraphs too.

[YOCTO #14508]
Reported-by: Quentin Schulz <foss@0leil.net>
(From yocto-docs rev: 885b60f5540849bf19240a01a77efce1d1b5d9f0)

Signed-off-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/documentation/migration-guides/migration-3.0.rst b/documentation/migration-guides/migration-3.0.rst
index 90736e6009..95a33d4dd4 100644
--- a/documentation/migration-guides/migration-3.0.rst
+++ b/documentation/migration-guides/migration-3.0.rst
@@ -282,8 +282,8 @@ The following miscellaneous changes have occurred.
 -  You must change the host distro identifier used in
    :term:`NATIVELSBSTRING` to use all lowercase
    characters even if it does not contain a version number. This change
-   is necessary only if you are not using ``uninative`` and
-   :term:`SANITY_TESTED_DISTROS`.
+   is necessary only if you are not using
+   :ref:`uninative <ref-classes-uninative>` and :term:`SANITY_TESTED_DISTROS`.
 
 -  In the ``base-files`` recipe, writing the hostname into
    ``/etc/hosts`` and ``/etc/hostname`` is now done within the main