Add Schunk SVH 5-finger Hand into list of robots. (backport #68)

[mergify]

This is an automatic backport of pull request #68 done by Mergify.
Cherry-pick of c71e159 has failed:

On branch mergify/bp/humble/pr-68
Your branch is up to date with 'origin/humble'.

You are currently cherry-picking commit c71e159.
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	both modified:   doc/supported_robots/supported_robots.rst

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To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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