Add ChangeLog for 2.5.3

Author: fendor

Changelog.md

@@ -1,5 +1,14 @@
 # Changelog for vscode-haskell
 
+## 2.5.3
+
+- Split out packaging action
+  ([#1080](https://github.com/haskell/vscode-haskell/pull/1080))  by @fendor
+- Add Session Loading style to list of known configs
+  ([#1077](https://github.com/haskell/vscode-haskell/pull/1077))  by @fendor
+- Tooling update
+  ([#1043](https://github.com/haskell/vscode-haskell/pull/1043))  by @bzm3r
+
 ## 2.5.2
 
 - Includes changes of the 2.4.3 release