Apply suggestion from @eric-forte-elastic

Co-authored-by: Eric Forte <[email protected]>

Author: shashank-elastic

tests/test_all_rules.py

@@ -1120,7 +1120,7 @@ def test_preserve_upstream_protected_rule_id_name(self):
 
         # map current rules by id and name for quick lookup
         current_rules = {rule.contents.data.get("rule_id"): rule.contents.data.get("name") for rule in self.all_rules}
-        failures = []
+        failures: list[str] = []
         for rule_id, rule_name in protected_rules.items():
             if rule_id in current_rules:
                 if rule_name != current_rules.get(rule_id):