Update Amazfish details in README.md

The openrepos contain obsolete version (description on the openrepos page says that). New SailfishOS version is in chum repo. Additionally, there is Ubuntu Touch and Flatpak version.

README.md

@@ -33,7 +33,7 @@
 ### Companion apps
 
 - [Gadgetbridge](https://gadgetbridge.org/) (Android)
-- [AmazFish](https://openrepos.net/content/piggz/amazfish/) (SailfishOS)
+- [Amazfish](https://github.com/piggz/harbour-amazfish/) ([SailfishOS](https://sailfishos-chum.github.io/apps/harbour-amazfish/), [Ubuntu Touch](https://open-store.io/app/uk.co.piggz.amazfish), [Flatpak](https://flathub.org/apps/uk.co.piggz.amazfish))
 - [Siglo](https://github.com/alexr4535/siglo) (Linux)
 - [InfiniLink](https://github.com/InfiniTimeOrg/InfiniLink) (iOS)
 - [ITD](https://gitea.elara.ws/Elara6331/itd) (Linux)