CI: Just require scheme-recommended for texlive.

Hopefully prevents the unusual failure at the install dependencies
stage.

.github/workflows/test_linux.yml

@@ -34,7 +34,7 @@ jobs:
       uses: zauguin/install-texlive@v3
       with:
         packages: >
-          latex-bin latexmk scheme-basic makeindex-bin imakeidx
+          latex-bin latexmk scheme-recommended
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names