bpo-1635741: sqlite3 uses Py_NewRef/Py_XNewRef (GH-23170)

diff --git a/Modules/_sqlite/microprotocols.c b/Modules/_sqlite/microprotocols.c
index 41f0867..e219a72 100644
--- a/Modules/_sqlite/microprotocols.c
+++ b/Modules/_sqlite/microprotocols.c
@@ -140,8 +140,7 @@ pysqlite_microprotocols_adapt(PyObject *obj, PyObject *proto, PyObject *alt)
     }
 
     if (alt) {
-        Py_INCREF(alt);
-        return alt;
+        return Py_NewRef(alt);
     }
     /* else set the right exception and return NULL */
     PyErr_SetString(pysqlite_ProgrammingError, "can't adapt");