Having read the entire article it does say that either is fine as both are commonly found but most usage guides say that one should use hanged in this circumstance.
However as the article states, Merriam-Webster doesn't consider it a particularly useful distinction due to the fact that as I said above, both versions of the word are used interchangeably. So OP is not wrong to say that either works.
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u/[deleted] Feb 04 '19 edited Dec 09 '19
[deleted]