Use Buildx in GH Actions

Author: droserasprout

.github/workflows/build.yml

@@ -22,7 +22,9 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v1
+        uses: docker/setup-buildx-action@v2
+        with:
+          install: true
 
       - name: Log in to the registry
         uses: docker/login-action@v1