Install sphinx-intl and blurb in Ci

Author: m-aciek

.github/workflows/update-lint-and-build.yml

@@ -19,7 +19,7 @@ jobs:
         with:
           python-version: 3
       - run: sudo apt-get install -y gettext
-      - run: pip install requests cogapp polib transifex-python
+      - run: pip install requests cogapp polib transifex-python sphinx-intl blurb
       - uses: actions/checkout@master
         with:
           ref: ${{ matrix.version }}