Four checks carried the task name of the check they were copy-pasted
from, so the redis -> valkey and keydb -> valkey checks both announced
themselves as matrix_redis ones, and both synapse OIDC label checks
announced themselves as matrix_ssl ones.

The matrix_nginx_proxy and matrix_ssl leftover messages also asked
people to rename variables, while the sentence right above them
(correctly) asks for these to be removed. The roles are gone, so there
is nothing to rename them to.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>