Fixes search query syntax

mad about the lack of django docs on this, jeez

bookwyrm/connectors/self_connector.py

@@ -143,7 +143,7 @@ def search_title_author(query, min_confidence, *filters):
     """searches for title and author"""
     query = SearchQuery(query, config="simple") | SearchQuery(query, config="english")
     results = (
-        models.Edition.objects.annotate(rank=SearchRank("search_vector", query))
+        models.Edition.objects.annotate(rank=SearchRank(F("search_vector"), query))
         .filter(*filters, search_vector=query, rank__gt=min_confidence)
         .order_by("-rank")
     )