fix: cache_checker filters

haystack/components/caching/cache_checker.py

@@ -108,7 +108,7 @@ def run(self, items: List[Any]):
  misses = []
 
  for item in items:
- filters = {self.cache_field: item}
+ filters = {"field": self.cache_field, "operator": "==", "value": item}
  found = self.document_store.filter_documents(filters=filters)
  if found:
  found_documents.extend(found)