Update changelog for 1.5.8 release
## HEAD (Unreleased)
-- Update to Pulumi NuGet 1.12.1 and .NET Core 3.1
-## 1.5.7 (March 10, 2020)
+## 1.5.8 (March 16, 2020)
### Improvements
-- Automatically populate type aliases and additional secret outputs in the .NET SDK.
- (https://github.com/pulumi/pulumi-kubernetes/pull/1026).
+- Automatically populate type aliases and additional secret outputs in the .NET SDK. (https://github.com/pulumi/pulumi-kubernetes/pull/1026).
+- Update to Pulumi NuGet 1.12.1 and .NET Core 3.1. (https://github.com/pulumi/pulumi-kubernetes/pull/1030).
+
+## 1.5.7 (March 10, 2020)
### Bug fixes
