Installing enchant package required by sphinxcontrib-spelling

Author: antonwolfy

.github/workflows/build-sphinx.yml

@@ -103,7 +103,7 @@ jobs:
       - name: Install sphinx dependencies
         run: |
           conda install sphinx sphinx_rtd_theme
-          pip install sphinxcontrib-googleanalytics==0.4 sphinxcontrib-spelling
+          pip install sphinxcontrib-googleanalytics==0.4 enchant sphinxcontrib-spelling
 
       - name: Install dpnp dependencies
         run: |