Update changelog for v3.75.2 (#517)

#516 didn't update the
CHANGELOG.md file so didn't trigger the release.

Author: Frassle

CHANGELOG.md

@@ -5,6 +5,12 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html),
 and is generated by [Changie](https://github.com/miniscruff/changie).
 
+## v3.75.2 - 2025-02-26
+
+### Bug Fixes
+
+- [runtime] Revert changes to target net8 in provider SDKs [#515](https://github.com/pulumi/pulumi-dotnet/pull/515)
+
 ## v3.75.1 - 2025-02-26
 
 Follow up release after v3.75, this reverts the updates to targeting net8.