Simplify the windows docs and fix formatting

The mention of NAT is confusing for those coming from pre-host-only networking b2d

Docker-DCO-1.1-Signed-off-by: SvenDowideit <SvenDowideit@home.org.au> (github: SvenDowideit)
Merge pull request #6294 from SvenDowideit/simplify-windows-networking-docs

Simplify the windows docs and fix formatting