Open Hardware Monitor is not maintained anymore. The last release was published on Dec 27, 2020. However, there are a few forks available, that can be used instead. The most promising fork seems to be Libre Hardware Monitor.
I haven't seen any breaking changes, so it can be used in the same way as Open Hardware Monitor with jPowerMonitor.
Therefore, I want to propose to replace Open Hardware Monitor with Libre Hardware Monitor in the documentation.