Improve changelog

Author: alex-kulakov

ChangeLog/7.2.0-Beta-2-dev.txt

@@ -1 +1,6 @@
-[main] Upgrade hints change names of constructors' string parameters for better understanding of what suppose to be in them.
+[main] Upgrade hints change names of constructors' string parameters for better understanding of what suppose to be in them.
+[main] Improved string operations Trim/TrimStart/TrimEnd support
+[mysql] SqlDml.NullIf function now correctly translated
+[mysql] Improved support for string.PadLeft/PadRight opertaions
+[sqlite] Fixed string.Lenght translation
+[sqlite] Added support for string.PadLeft/PadRight operations