fix deps for clang/doxy

.github/workflows/githubci.yml

@@ -35,8 +35,19 @@ jobs:
     - uses: actions/setup-python@v1
       with:
         python-version: '3.x'
+    - uses: actions/checkout@v2
+
+    - uses: actions/checkout@v2
+      with:
+         repository: adafruit/ci-arduino
+         path: ci
+
+    - name: pre-install
+      run: bash ci/actions_install.sh
+
     - name: clang
       run: python3 ci/run-clang-format.py -e "ci/*" -e "bin/*" -r . 
+
     - name: doxygen
       env:
         GH_REPO_TOKEN: ${{ secrets.GH_REPO_TOKEN }}