docs/interop/parallels.txt: Convert to rST

Convert parallels.txt to rST format.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20240801170131.3977807-4-peter.maydell@linaro.org
3 files changed