[gen/wiki] Add example of reservation command for each cluster

5 jobs for fix_wiki_gen_exotic in 5 minutes and 38 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Validate
passed #897370
grid5000-docker
rubocop

00:00:30

passed #897371
grid5000-docker
validate-data

00:01:33

 
  Generate
passed #897372
grid5000-docker
generate-reference-api

00:01:22

 
  Deploy
passed #897373
grid5000-shell
deploy

00:00:17

passed #897374
grid5000-docker
rspec

00:02:42