Add GhostScript installation step to GitHub Actions workflow to enable the creation of printable PDF files

The commit includes the modification in the release.yml file of the
GitHub Actions workflow to add an installation step for GhostScript
before the Build step. This change ensures that GhostScript is available
during the workflow execution to generate printable PDF files
effectively.

Author: placek

.github/workflows/release.yml

@@ -9,8 +9,10 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
+      - name: Install GhostScript
+        run: sudo apt-get update && sudo apt-get install -y ghostscript
       - name: Build
-        run: make screen
+        run: make
       - name: Create release
         uses: softprops/action-gh-release@v2
         if: startsWith(github.ref, 'refs/tags/')