fix(velodyne_monitor): add temp_hot_*** to 20 (#1744)

[h-ohta]

Description

autowarefoundation#1744 のbackport

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[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (beta/v0.4.1@7e2609b). Click here to learn what that means.
The diff coverage is n/a.

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  Misses                 ?     121           
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Flag	Coverage Δ
differential	0.00% <0.00%> (?)

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[s-azumi]

LGTM