Fix sintax

.github/workflows/protocol_tests.yml

@@ -65,7 +65,7 @@ jobs:
 
       - name: Fail if there are tests without folder
         if: success() || failure()
-        run: ! ls test-sol | grep -qi '\.t\.sol'
+        run: exit !(ls test-sol | grep -qi '\.t\.sol')
 
       - name: Run Everything just in case something was missed
         # can't use gas limit because some setUp function use more than the limit