github: Add linux-modules-extra (for vrf)

Signed-off-by: Stéphane Graber <[email protected]>

Author: stgraber

.github/workflows/tests.yml

@@ -267,6 +267,7 @@ jobs:
             libsqlite3-dev \
             libtool \
             libudev-dev \
+            linux-modules-extra-$(uname -r) \
             make \
             pkg-config\
             acl \