Issue template: which store are you using shouldn't be Android-only

[krille-chan]

Description

The FluffyChat issue template currently has the following section below additional information:

- Device: 
- OS and OS version: 
- Installed version of FluffyChat: 
- (Android only) Which store are you using: 
- (Android only) Are Google Services available: 

I think the second to last question, "Which store are you using", should have "(Android only)" removed as in addition to Android's Play Store and F-Droid, FluffyChat is distributed in Snap (which is calling itself as Snap Store) and Flatpak which both have integration to Linux app collections which are often called as stores.

Additionally on iOS I think it's meaningful to know whether the user is using a Testflight build or not and I am treating Testflight as a store in a couple of my previous issues. I understand jailbroken iOS to have other stores available too, while I have no idea if FluffyChat is available in those.

To Reproduce

Open a new issue at FluffyChat here at GitLab.

[github-actions]

This issue is stale because it has been open for 120 days with no activity.

[github-actions]

This issue was closed because it has been inactive for 14 days since being marked as stale.