[3.10] Fix docstring typo in sqlite3.Connection.executescript/sqlite3.Cursor.executescript (GH-27147) (GH-27151)

Both `executescript` methods contain the same docstring typo:
_"Executes a multiple SQL statements at once."_ => _"Executes multiple SQL statements at once."_

Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no>
diff --git a/Modules/_sqlite/connection.c b/Modules/_sqlite/connection.c
index 4e0ad9a..95f6029 100644
--- a/Modules/_sqlite/connection.c
+++ b/Modules/_sqlite/connection.c
@@ -1456,13 +1456,13 @@ _sqlite3.Connection.executescript as pysqlite_connection_executescript
     sql_script as script_obj: object
     /
 
-Executes a multiple SQL statements at once. Non-standard.
+Executes multiple SQL statements at once. Non-standard.
 [clinic start generated code]*/
 
 static PyObject *
 pysqlite_connection_executescript(pysqlite_Connection *self,
                                   PyObject *script_obj)
-/*[clinic end generated code: output=4c4f9d77aa0ae37d input=c0b14695aa6c81d9]*/
+/*[clinic end generated code: output=4c4f9d77aa0ae37d input=b27ae5c24ffb8b43]*/
 {
     _Py_IDENTIFIER(executescript);
     PyObject* cursor = 0;