This new name seems likely to stay given that logstash is a misnomer per our switch to OpenSearch and keeping it less branded this time around seems good.
For convenience of habit and old docs, I propose to redirect these names.
From asking on IRC, @bd808 tells me this can be done through the "Redirects" VPS project which has the benefit of not requiring any custom nginx or Apache logic within beta cluster to serve this redirect.
(I already checked and indeed, it seems pointing the same name to the same VM is not resulting in an automatic redirect to a known canonical url of sorts.)