Add missing dependency to run check-mkfs-confs.sh in CI

Signed-off-by: Paul Mars <paul.mars@canonical.com>

.github/workflows/build-and-test.yml

@@ -64,6 +64,12 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 2
+      - name: apt-update
+        run: sudo apt update
+
+      - name: install-test-dependencies
+        run: sudo apt install -y devscripts
+
       - name: check mkfs conf updates
         id: check-mkfs
         shell: bash