Update build-ubuntu-22.04-risc.yml

Author: emlowe

.github/workflows/build-ubuntu-22.04-risc.yml

@@ -24,6 +24,7 @@ jobs:
   build:
     uses: Chia-Network/actions/.github/workflows/docker-build.yaml@main
     with:
+      enable-qemu-cache: false
       alternate-latest-mode: true
       runs-on: k8s-public
       timeout-minutes: 240