Minor - updated changelog for 4.2.0.0

Author: ovidiuvio

changelog.txt

@@ -1,3 +1,8 @@
+VSDebugPro_4-2-0-0
+    [+] Added repeat last action command
+    [+] Added a command to export the commands history buffer as yaml
+    [+] Updated icons, toolbar
+
 VSDebugPro_4-1-1-0
     [+] VS2019 compatibility
 
@@ -177,4 +182,4 @@ VSDebugTool_2-0-3-0_2013-06-29
     [+] Visual Studio 2013 support
     [*] fixed an exception thrown in extensions manager
     [*] the help button will now open the support page on this website
-    [*] added logo, thumbnail to the vsix package
+    [*] added logo, thumbnail to the vsix package