Add 0.4.1 release changelog (#714)

CHANGELOG.md

@@ -1,6 +1,21 @@
 CHANGELOG
 =========
 
+## 0.4.1 (2022-06-30)
+
+### Improvements
+
+- [sdk] #553: Added `com.pulumi.test` package with new idiomatic Java API for [unit testing Pulumi programs]
+  (https://www.pulumi.com/docs/guides/testing/#unit-testing) against mocks.
+  See ([example](https://github.com/pulumi/pulumi-java/tree/main/tests/examples/testing-unit-java)) of using the new API.
+
+- [codegen] [#709](https://github.com/pulumi/pulumi-java/pull/709)
+  Improved version handling in `pulumi-java-gen`: now `--version`
+  argument is optional and the version of the generated package need
+  not be known at SDK code generation time and is not spliced into the
+  code. To set the version at build time use
+  `gradle -Pversion=1.2.3 build` or `PACKAGE_VERSION=1.2.3 gradle build`.
+
 ## 0.4.0 (2022-06-22)
 
 ### Improvements