ci: exclude test/ from .org source check

test/ directory contains standalone helper scripts that don't
have corresponding .org sources (run-tests.lisp, test_native_embedding).

.github/workflows/lint.yml

@@ -39,7 +39,7 @@ jobs:
       - name: Verify each .lisp has a corresponding .org source
         run: |
           FAIL=0
-          for f in lisp/*.lisp test/*.lisp; do
+          for f in lisp/*.lisp; do
             [ -f "$f" ] || continue
             base=$(basename "$f" .lisp)
             if [ -f "org/${base}.org" ]; then