Add a CHANGELOG entry for 7f84694

Ref: 7f84694

Signed-off-by: William Desportes <williamdes@wdes.fr>

Author: williamdes

CHANGELOG.md

@@ -7,6 +7,7 @@
 - Fix ALTER EVENT statement with DEFINER=user modifier fails to be parsed (#418)
 - Fix GROUP BY modifier WITH ROLLUP is treated as a syntax error and prevents export of SQL query results
 - Fix `TokensList::getPrevious` was not able to reach very first token (#428)
+- Fix `TransactionStatement::build()` "Call to a member function build() on null" when the transaction has no end
 
 ## [5.7.0] - 2023-01-25