CI: install jq for FreeBSD build.

rustyrussell · rustyrussell · commit afe911173a2a · 2025-04-23T09:21:43.000+09:30
```
  checking for jq... not found
  *** We need jq!
```

Signed-off-by: Rusty Russell &lt;rusty@rustcorp.com.au&gt;
diff --git a/.github/workflows/bsd.yml b/.github/workflows/bsd.yml
@@ -42,6 +42,7 @@ jobs:
             sqlite3 \
             lowdown \
             pkgconf \
+            jq \
             curl
 
             python3.10 -m ensurepip
