doc: enable no-file-name-articles remark-lint rule

This renames doc/topics/the-event-loop-timers-and-nexttick.md to
doc/topics/event-loop-timers-and-nexttick.md, which looks like a
better name for that file and enables no-file-name-articles remark-lint
rule to prevent such names in the future.

PR-URL: https://github.com/nodejs/node/pull/8713


Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Ilkka Myller <ilkka.myller@nodefield.com>
Reviewed-By: James M Snell <jasnell@gmail.com>