Improve changlog

Author: alex-kulakov

ChangeLog/6.0.14_dev.txt

@@ -1,3 +1,4 @@
 [main] Addressed issue of not visiting grouping expression correctly which appeared in previous version
 [main] Addressed certain issues of incorrect query optimization when it contains multiple In() calls
 [main] In addition to previous version, more cases of incorrect join type usage addressed
+[postgresql] Updated Npgsql package to version 4.0.17 which patches some vulnerablity issues