Update docker.yaml

Author: walnuts1018

.github/workflows/docker.yaml

@@ -43,10 +43,10 @@ jobs:
         with:
           push: true
           context: .
-          platforms: linux/amd64
+          platforms: linux/amd64,linux/arm64
           cache-from: type=gha
           cache-to: type=gha,mode=max
-          build-args: TARGETARCH=amd64,TARGETOS=linux
+          build-args: TARGETOS=linux
           tags: |
             ghcr.io/walnuts1018/code-server-operator:latest
             ghcr.io/walnuts1018/code-server-operator:${{ github.event.release.tag_name }}