fix spellcheck setup

Author: dbu

.github/workflows/spellcheck.yml

@@ -15,7 +15,7 @@ jobs:
                   python-version: 3.7
             - name: Install dependencies
               run: |
-                  sudo apt update && sudo apt install -y enchant
+                  sudo apt update && sudo apt install -y enchant-2
                   python -m pip install --upgrade setuptools
                   python -m pip install --upgrade pyenchant sphinx-rtd-theme sphinxcontrib-spelling
             - name: Check spelling