ci: move freebsd to Namespace (#168)

Author: mitchellh

.github/workflows/test.yml

@@ -91,13 +91,14 @@ jobs:
     - run: nix build
 
   test-x86_64-freebsd:
-    # Doesn't work on Namespace yet, opened support ticket.
-    # runs-on: namespace-profile-mitchellh-sm
-    runs-on: ubuntu-latest
+    runs-on: namespace-profile-mitchellh-sm-systemd
     steps:
     - name: Checkout code
       uses: actions/checkout@v4
 
+    # Required by Namespace
+    - run: sudo systemctl start ssh
+
     - name: test
       uses: vmactions/freebsd-vm@v1
       with: