update doc comments for cozo_run_query

cozo-lib-c/cozo_c.h

@@ -53,8 +53,7 @@ bool cozo_close_db(int32_t db_id);
  *                    in JSON format. You must always pass in a valid JSON map,
  *                    even if you do not use params in your query
  *                    (pass "{}" in this case).
- * `errored`:    will point to `false` if the query is successful,
+ * `immutable_query`: whether the query is read-only.
- *               `true` if an error occurred.
  *
  * Returns a UTF-8-encoded C-string that **must** be freed with `cozo_free_str`.
  * The string contains the JSON return value of the query.

cozo-lib-c/src/lib.rs

@@ -97,8 +97,7 @@ pub unsafe extern "C" fn cozo_close_db(db_id: i32) -> bool {
 ///                    in JSON format. You must always pass in a valid JSON map,
 ///                    even if you do not use params in your query
 ///                    (pass "{}" in this case).
-/// `errored`:    will point to `false` if the query is successful,
+/// `immutable_query`: whether the query is read-only.
-///               `true` if an error occurred.
 ///
 /// Returns a UTF-8-encoded C-string that **must** be freed with `cozo_free_str`.
 /// The string contains the JSON return value of the query.