[meta] Update READMEs to mention the new Auth Desktop app (#1269)

Fixes https://github.com/ente-io/ente/issues/1268

README.md

@@ -70,7 +70,7 @@ existing users will be grandfathered in.
 [<img height="42" src=".github/assets/app-store-badge.svg">](https://apps.apple.com/app/id6444121398)
 [<img height="42" src=".github/assets/play-store-badge.png">](https://play.google.com/store/apps/details?id=io.ente.auth)
 [<img height="42" src=".github/assets/f-droid-badge.png">](https://f-droid.org/packages/io.ente.auth/)
-[<img height="42" src=".github/assets/github-badge.png">](https://github.com/ente-io/ente/releases?q=tag%3Aauth-v2)
+[<img height="42" src=".github/assets/desktop-badge.png">](https://github.com/ente-io/ente/releases?q=tag%3Aauth-v2)
 [<img height="42" src=".github/assets/web-badge.svg">](https://auth.ente.io)
 
 </div>

auth/README.md

@@ -31,14 +31,16 @@ You can alternatively install the build from PlayStore or F-Droid.
   <img height="59" src="../.github/assets/app-store-badge.svg">
 </a>
 
-### Web
+### Desktop
 
-You can view your 2FA codes at [auth.ente.io](https://auth.ente.io). For adding
-or managing your secrets, please use our mobile app.
+You can [**download**](https://github.com/ente-io/ente/releases?q=tag%3Aauth-v2)
+a native desktop app from this repository's GitHub releases. The desktop app
+works on Windows, Linux and macOS.
 
-### Desktop
+### Web
 
-A native desktop app is coming soon!
+You can view your 2FA codes at [auth.ente.io](https://auth.ente.io). For adding
+or managing your secrets, please use our mobile or desktop app.
 
 ## 🧑‍💻 Build from source