[3.10] bpo-45126: Fix ref. leak in sqlite3.Connection.__init__ (GH-28231). (GH-28298)

(cherry picked from commit aa6dd54d43)

Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no>

Modules/_sqlite/connection.c

@@ -97,6 +97,7 @@ int pysqlite_connection_init(pysqlite_Connection* self, PyObject* args, PyObject
     }
 
     if (PySys_Audit("sqlite3.connect", "O", database_obj) < 0) {
+        Py_DECREF(database_obj);
         return -1;
     }