update docs

doc/changelog.txt

@@ -1,4 +1,4 @@
-# upcoming
+# v2.4 (2023-08-15)
 
 - (new) ARM build support (thanks to @tillcash & @fenuks)
 - (new) auth configuration via param or env variable (thanks to @pierreprinetti)

readme.md

@@ -3,13 +3,13 @@
 **yarr** (yet another rss reader) is a web-based feed aggregator which can be used both
 as a desktop application and a personal self-hosted server.
 
-It is written in Go with the frontend in Vue.js. The storage is backed by SQLite.
+The app is a single binary with an embedded database (SQLite).
 
 ![screenshot](etc/promo.png)
 
 ## usage
 
-The latest prebuilt binaries for Linux/MacOS/Windows are available
+The latest prebuilt binaries for Linux/MacOS/Windows AMD64 are available
 [here](https://github.com/nkanaev/yarr/releases/latest).
 
 ### macos