feat(workflows): ensure SSH dir exists before scanning host

Preemptively creating the `~/.ssh` directory before attempting to add the SSH server's host key to `known_hosts`. This change prevents potential failures in CI workflows where the `.ssh` directory might not exist on a fresh runner environment, ensuring a smoother and more reliable setup for SSH connections.

This adjustment enhances the resilience of the testing workflow by avoiding errors related to missing directories, thereby improving automated testing reliability and efficiency.

.forgejo/workflows/test.yml

@@ -36,6 +36,7 @@ jobs:
 
       - name: Trust SSH server's host key (to prevent interactive prompt)
         run: |
+          mkdir -p ~/.ssh
           ssh-keyscan -p 2222 -H localhost >> ~/.ssh/known_hosts
 
       - name: Connect to SSH server using SSH key