[WIKI] Update SpiralLinux Documentation remove non-working url.

[GAC-Machine]

Description

Remove the following url from:

URL NOT reachable anymore http://wiki.rosalab.com/en/index.php/ROSA_ImageWriter

• Wikl section > SpiralLinux Documentation > How to create a bootable SpiralLinux USB stick > in Windows
• Wikl section > SpiralLinux Documentation > How to create a bootable SpiralLinux USB stick > in Linux

Please remove it!!

Additional info

Also add a comment for first listed item adding "a recommended one: it's cross-platform, fast and lightweight".