Use correct package manager to install dependencies

lethosor · lethosor · commit eed33ff68de3 · 2019-10-05T22:09:21.000-04:00
diff --git a/.github/workflows/build-docs.yml b/.github/workflows/build-docs.yml
@@ -8,7 +8,8 @@ jobs:
     steps:
     - name: Install dependencies
       run: |
-        apk add git python3 zip
+        apt-get update
+        apt-get install -y git python3 python3-pip zip
         pip3 install sphinx
     - uses: actions/checkout@v1
     - name: Set up DFHack
