Update changelog

CHANGELOG.md

@@ -104,6 +104,8 @@
 - Updated DiscoverController, fix trending api. ([2ab2c9a](https://github.com/pixelfed/pixelfed/commit/2ab2c9a))
 - Updated Dark Mode layout. ([d6f8170](https://github.com/pixelfed/pixelfed/commit/d6f8170))
 - Updated federation config, make sharedInbox enabled by default. ([6e3522c0](https://github.com/pixelfed/pixelfed/commit/6e3522c0))
+- Updated PostComponent, change timestamp format. ([e51665f6](https://github.com/pixelfed/pixelfed/commit/e51665f6))
+- Updated PostComponent, use proper username context for reply mentions. Fixes ([#2421](https://github.com/pixelfed/pixelfed/issues/2421)). ([dac06088](https://github.com/pixelfed/pixelfed/commit/dac06088))
 
 ## [v0.10.9 (2020-04-17)](https://github.com/pixelfed/pixelfed/compare/v0.10.8...v0.10.9)
 ### Added