ci: stop FreeBSD job after 30 minutes

(cherry picked from commit aee4862958d3365d3995d017d4d3b4642edd6358)

.github/workflows/vmactions.yml

@@ -6,6 +6,7 @@ jobs:
   freebsd:
     runs-on: macos-12
     name: FreeBSD
+    timeout-minutes: 30
     steps:
     - uses: actions/checkout@v3
     - name: Build