Fix Ubuntu AArch64 CI - round 3 (#811)

.github/workflows/build-ubuntu-aarch64.yml

@@ -29,6 +29,7 @@ jobs:
       shell: bash
       working-directory: ${{runner.workspace}}
       run: |
+        sudo rm -f /etc/apt/sources.list.d/kubernetes.list
         sudo dpkg --add-architecture arm64
         sudo sh -c "sed \"s|^deb \([a-z\.:/]*\) \([a-z\-]*\) \(.*\)$|deb [arch=amd64] \1 \2 \3\ndeb [arch=arm64] http://ports.ubuntu.com/ubuntu-ports \2 \3|\" /etc/apt/sources.list > /etc/apt/sources.list.new"
         sudo rm /etc/apt/sources.list