ci: Test OCR as well

Now that OCR is performed on host, and not in the container, it's
important to add it in our smoke test.

.github/workflows/check-packages.yml

@@ -59,7 +59,7 @@ jobs:
         working-directory: main
         run: |
           ./dev_scripts/env.py --distro fedora --version ${{ matrix.version }} \
-              run dangerzone-cli dangerzone/tests/test_docs/sample-pdf.pdf
+              run dangerzone-cli dangerzone/tests/test_docs/sample-pdf.pdf --ocr-lang eng
 
       - name: Check that the Dangerzone GUI imports work
         working-directory: main