update readme

Presence of phantom process killer on Android 12 doesn't mean Termux is
broken. It could be unstable because of abrupt termination of all
processes by signal 9 under certain cases. But this doesn't mean it is
unusable on all devices with Android 12 or higher.

The word "broken" could be too scary for new users.

README.md

@@ -15,7 +15,7 @@ Quick how-to about Termux package management is available at [Package Management
 
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-**NOTICE: Termux is broken on Android 12.** Android OS will kill any (phantom) processes greater than 32 (limit is for all apps combined) and also kill any processes using excessive CPU. You may get `[Process completed (signal 9) - press Enter]` message in the terminal without actually exiting the shell process yourself. Check the related issue [#2366](https://github.com/termux/termux-app/issues/2366), [issue tracker](https://issuetracker.google.com/u/1/issues/205156966), [phantom cached and empty processes docs](https://github.com/agnostic-apollo/Android-Docs/blob/master/en/docs/apps/processes/phantom-cached-and-empty-processes.md) and [this TLDR comment](https://github.com/termux/termux-app/issues/2366#issuecomment-1237468220) on how to disable trimming of phantom and excessive cpu usage processes. A proper docs page will be added later. An option to disable the killing should be available in Android 12L or 13, so upgrade at your own risk if you are on Android 11, specially if you are not rooted.
+**NOTICE: Termux may be unstable on Android 12+.** Android OS will kill any (phantom) processes greater than 32 (limit is for all apps combined) and also kill any processes using excessive CPU. You may get `[Process completed (signal 9) - press Enter]` message in the terminal without actually exiting the shell process yourself. Check the related issue [#2366](https://github.com/termux/termux-app/issues/2366), [issue tracker](https://issuetracker.google.com/u/1/issues/205156966), [phantom cached and empty processes docs](https://github.com/agnostic-apollo/Android-Docs/blob/master/en/docs/apps/processes/phantom-cached-and-empty-processes.md) and [this TLDR comment](https://github.com/termux/termux-app/issues/2366#issuecomment-1237468220) on how to disable trimming of phantom and excessive cpu usage processes. A proper docs page will be added later. An option to disable the killing should be available in Android 12L or 13, so upgrade at your own risk if you are on Android 11, specially if you are not rooted.
 
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