Update changelog

CHANGELOG.md

@@ -6,6 +6,13 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [PEP 440](https://www.python.org/dev/peps/pep-0440/)
 and uses [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.5.1](https://github.com/ASFHyP3/hyp3-autorift/compare/v0.5.0...v0.5.1)
+
+### Changed
+* Minor updates to the netCDF product metadata
+* Pairs that end up having a 0 ROI (no valid data) will not fail at the end of processing,
+  but instead will upload a netCDF product that reports 0 ROI
+
 ## [0.5.0](https://github.com/ASFHyP3/hyp3-autorift/compare/v0.4.5...v0.5.0)
 
 ### Changed