Update info about support Linux/OS/archs

What does this MR do?

Update info about support Linux/OS/archs

Why was this MR needed?

• x86 is named 386 for the Runner, so users might get a bit confused.
• We also support arm which is different then arm64.
• We also support Mint.
• Add a list of supported operating systems.

What are the relevant issue numbers?

!2278 (merged)