update build.yml

Author: AkashiSN

.github/workflows/build.yml

@@ -86,12 +86,12 @@ jobs:
         run: |
           docker pull nvidia/cuda:11.1-devel-ubuntu20.04
           docker pull ubuntu:20.04
-        - name: run if cuda_ubuntu_pull failed
+      - name: run if cuda_ubuntu_pull failed
         if: failure() && steps.cuda_ubuntu_pull.outcome == 'failure'
         run: |
           docker pull nvidia/cuda:11.1-devel-ubuntu20.04
           docker pull ubuntu:20.04
-        - name: build ffmpeg
+      - name: build ffmpeg
         run: |
           docker build -t ffmpeg:cuda -f cuda.dockerfile .
       - name: test run ffmepg