Update deploy-vpn.yml

Author: chrisjsimpson

.github/workflows/deploy-vpn.yml

@@ -22,7 +22,7 @@ jobs:
     - name: Setting up SSH key
       uses: webfactory/ssh-agent@v0.8.0
       with:
-        ssh-private-key: ${{ secrets.SSH_PRIVATE_KEY }}
+        ssh-private-key: ${{ secrets.VPN_SSH_PRIVATE_KEY }}
 
     - name: SSH into remote host
       run: |