update changelog for 5.3.3 (#1224)

Includes the bugfix for making the `pulumi-version-file` option work
in non-install mode as well, and a fix for only downloading the latest
version when it's actually necessary.

CHANGELOG.md

@@ -2,14 +2,18 @@
 
 ## HEAD (Unreleased)
 
+**(none)**
+
+---
+
+## 5.3.3 (2024-07-11)
+
 - fix: download latest version only when necessary when 'pulumi-version: latest'
   is specified ((#1225)[https://github.com/pulumi/actions/pull/1225])
 
 - fix: make `pulumi-version-file` work in non-install mode as well
   ((#1216)[https://github.com/pulumi/actions/pull/1216])
 
----
-
 ## 5.3.2 (2024-06-25)
 
 - fix: add 3.120.0 to the list of known-bad versions