add apt-get update

Author: dhalbert

.github/workflows/build.yml

@@ -35,6 +35,7 @@ jobs:
         python-version: 3.8
     - name: Install deps
       run: |
+        sudo apt-get update
         sudo apt-get install -y eatmydata
         sudo eatmydata apt-get install -y gettext librsvg2-bin mingw-w64 latexmk texlive-fonts-recommended texlive-latex-recommended texlive-latex-extra
         pip install requests sh click setuptools cpp-coveralls "Sphinx<4" sphinx-rtd-theme recommonmark sphinx-autoapi sphinxcontrib-svg2pdfconverter polib pyyaml astroid isort black awscli mypy