message: Clarify architecture support
diff: @@ -55,7 +55,7 @@ A cross-platform graphical process/system monitor with a customizable interface
  Note that bottom is:
  - Built on the stable version of Rust
  -- Tested and released for only 64-bit
  +- Tested and released for only `x86_64` (and `i686` for Windows)
  - Developed mainly for macOS, Windows, and Linux
  As such, support beyond that is not guaranteed.
  