Fix QueryResult::Slice model

Author: egregius313

go/ql/lib/ext/github.com.rqlite.gorqlite.model.yml

@@ -51,4 +51,4 @@ extensions:
       extensible: summaryModel
     data:
       - ["group:gorqlite", "QueryResult", True, "Map", "", "", "Argument[receiver]", "ReturnValue[0]", "taint", "manual"]
-      - ["group:gorqlite", "QueryResult", True, "Slice", "", "", "Argument[receiver]", "Argument[0]", "taint", "manual"]
+      - ["group:gorqlite", "QueryResult", True, "Slice", "", "", "Argument[receiver]", "ReturnValue[0]", "taint", "manual"]