Update build.yml

.github/workflows/build.yml

@@ -25,6 +25,8 @@ jobs:
         with:
           go-version: 'stable'
       - name: Prepare
-        run: sudo apt-get install --no-install-recommends -y make gcc libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev
+        run: |
+          sudo apt-get update
+          sudo apt-get install --no-install-recommends -y make gcc libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev
       - name: Build
         run: make build