fix known hosts

.github/workflows/build.yml

@@ -36,10 +36,8 @@ jobs:
       - name: Install SSH Key
         uses: shimataro/ssh-key-action@v2
         with:
-          key: ${{ secrets.SSH_PRIVATE_KEY }} 
-
-      - name: Adding Known Hosts
-        run: ssh-keyscan -H ${{ secrets.SSH_HOST }} >> ~/.ssh/known_hosts
+          key: ${{ secrets.SSH_PRIVATE_KEY }}
+          known_hosts: ${{ secrets.KNOWN_HOSTS }}
 
       - name: build
         run: make -j dists updates