Merge branch 'bump-3.1' into 'develop'

Bump CHANGELOG to v3.1

See merge request soapbox-pub/soapbox!2167

CHANGELOG.md

@@ -6,6 +6,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+### Changed
+
+### Fixed
+
+## [3.1.0] - 2023-01-13
+
 ### Added
 - Compatibility: rudimentary support for Takahē.
 - UI: added backdrop blur behind modals.