prep 0.4.0 release

CHANGELOG.md

@@ -6,6 +6,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 ### Changed
+
+## [0.4.0]
+### Changed
 - [issues/25](https://github.com/podaac/net2cog/issues/25): Converted harmony adapter to operate on STAC catalog
 - [issues/3](https://github.com/podaac/net2cog/issues/3): Improved error handling and updated test cases to use new-style harmony execution
 
@@ -33,5 +36,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Setup process for deploying the netcdf reformatter to SIT using Terraform deployment via Jenkins.  In order to accomplish this I setup unique terraform naming conventions for the netcdf converter while maintaining the same terraform config as l2ss.  Updated the jenkins logic to allow for SIT deployment testing. 
 
 
-[Unreleased]: https://github.com/podaac/net2cog/compare/v0.3.0...HEAD
+[Unreleased]: https://github.com/podaac/net2cog/compare/v0.4.0...HEAD
+[0.4.0]: https://github.com/podaac/net2cog/compare/v0.3.0...v0.4.0
 [0.3.0]: https://github.com/podaac/net2cog/compare/eabb00704a6fc693aa4d79536dc5c5354c6de4d9...v0.3.0