update changelog for maia-sdr-v0.3.1

Signed-off-by: Daniel Estévez <[email protected]>

CHANGELOG.md

@@ -13,14 +13,22 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.3.1] - 2023-09-03
+
+### Changed
+
+- Update Maia SDR to v0.5.1. Fixed SigMF formatting. Updated Rust dependencies.
+
 ## [0.3.0] - 2023-07-08
 
 ### Added
+
 - Update Maia SDR to v0.5.0. Added Support for Pluto+.
 
 ## [0.2.1] - 2023-06-10
 
 ### Changed
+
 - Update Maia SDR to v0.3.2. Updated Rust dependencies.
 
 ## [0.2.0] - 2023-04-08
@@ -47,7 +55,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 Initial release of the Maia SDR ADALM Pluto firmware. This corresponds to the
 [default ADI firmware v0.35](https://github.com/analogdevicesinc/plutosdr-fw/releases/tag/v0.35).
 
-[unreleased]: https://github.com/maia-sdr/plutosdr-fw/compare/maia-sdr-v0.3.0...HEAD
+[unreleased]: https://github.com/maia-sdr/plutosdr-fw/compare/maia-sdr-v0.3.1...HEAD
+[0.3.1]: https://github.com/maia-sdr/plutosdr-fw/compare/maia-sdr-v0.3.0...maia-sdr-v0.3.1
 [0.3.0]: https://github.com/maia-sdr/plutosdr-fw/compare/maia-sdr-v0.2.1...maia-sdr-v0.3.0
 [0.2.1]: https://github.com/maia-sdr/plutosdr-fw/compare/maia-sdr-v0.2.0...maia-sdr-v0.2.1
 [0.2.0]: https://github.com/maia-sdr/plutosdr-fw/compare/maia-sdr-v0.1.2...maia-sdr-v0.2.0