CI: Print installs its Linux packages through the shared fallback mirrors (#6308)

The Print job runs its own apt-get, so it failed while ubuntu.com did not resolve on the runners
(11 Nov 2026). configure-apt-mirrors (craft-common-actions) points apt at mirrors outside
ubuntu.com when those don't answer, as the shared jobs already do.

.github/workflows/printing.yml

@@ -64,6 +64,11 @@ jobs:
           echo "CRAFT_FONTS_DIR=$GITHUB_WORKSPACE/craft-fonts" >> "$GITHUB_ENV"
           echo "CRAFT_FONTS_REQUIRED=1" >> "$GITHUB_ENV"
 
+      # apt falls back to mirrors outside ubuntu.com when it doesn't resolve (as on 11 Nov 2026).
+      - name: Configure apt mirrors
+        if: runner.os == 'Linux'
+        uses: storytold/craft-common-actions/actions/configure-apt-mirrors@main
+
       - name: Install Linux build and software-rendering dependencies
         if: runner.os == 'Linux'
         run: |