ci: do not use buildx [push docker]

Author: aminya

.github/workflows/CI.yml

@@ -262,9 +262,6 @@ jobs:
             echo "suffix=arm64" >> $GITHUB_OUTPUT
           fi
 
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-
       - name: Login to Docker Hub
         uses: docker/login-action@v3
         if: ${{ github.event_name != 'pull_request' || contains(github.event.head_commit.message, '[push docker]') }}