win32: fix README file in NSIS installer

Adjust after the rST conversion and consequent renaming.

Fixes: 336a7451e8803c21a2da6e7d1eca8cfb8e8b219a
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
1 file changed