Add known hosts to be set up

Author: iliaross

.github/workflows/virtualmin.dev:virtualmin-nginx.yml

@@ -14,6 +14,7 @@ jobs:
     secrets:
       DEV_GPG_PH: ${{ secrets.DEV_GPG_PH }}
       DEV_IP_ADDR: ${{ secrets.DEV_IP_ADDR }}
+      DEV_IP_KNOWN_HOSTS: ${{ secrets.DEV_IP_KNOWN_HOSTS }}
       DEV_UPLOAD_SSH_USER: ${{ secrets.DEV_UPLOAD_SSH_USER }}
       DEV_UPLOAD_SSH_DIR: ${{ secrets.DEV_UPLOAD_SSH_DIR }}
       DEV_SSH_PRV_KEY: ${{ secrets.DEV_SSH_PRV_KEY }}