Fix action syntax

Author: mitchdowney

.github/workflows/master.yml

@@ -39,11 +39,11 @@ jobs:
       name: Set up Docker Buildx
       uses: docker/setup-buildx-action@v3
 
-      -
-        name: Build and push
-        uses: docker/build-push-action@v5
-        with:
-          context: .
-          file: ./Dockerfile
-          push: true
-          tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest
+    -
+      name: Build and push
+      uses: docker/build-push-action@v5
+      with:
+        context: .
+        file: ./Dockerfile
+        push: true
+        tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest