build: correct GCLIENT_EXTRA_ARGS in linux-publish (#42575)

.github/workflows/linux-publish.yml

@@ -27,7 +27,7 @@ jobs:
         - /mnt/cross-instance-cache:/mnt/cross-instance-cache
         - /var/run/sas:/var/run/sas
     env:
-      GCLIENT_EXTRA_ARGS: '--custom-var=checkout_mac=True --custom-var=host_os=mac'
+      GCLIENT_EXTRA_ARGS: '--custom-var=checkout_arm=True --custom-var=checkout_arm64=True'
     steps:
     - name: Checkout Electron
       uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332