ci: Bump Landlock ABI version for Ubuntu 24

Ubuntu 24.04 switched to Linux version 6.11.0-1012-azure which supports
Landlock ABI v5.

See https://ubuntu.com/kernel/lifecycle

Signed-off-by: Mickaël Salaün <mic@digikod.net>

Author: l0kod

.github/workflows/rust.yml

@@ -114,7 +114,7 @@ jobs:
       matrix:
         commit: ${{ fromJSON(needs.commit_list.outputs.commits) }}
     env:
-      LANDLOCK_CRATE_TEST_ABI: 4
+      LANDLOCK_CRATE_TEST_ABI: 5
     steps:
 
     - uses: actions/checkout@v4