doc/user.md: fix link

4 jobs for doc/detail in 2 minutes and 6 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test Tools
passed #683650
test_tools

00:00:08

 
  Tgz Release
passed #683682
cidocker
build_doc

00:01:49

failed #683651
cidocker allowed to fail
build_doc

00:02:02

 
  Deploy Prod
passed #683652
manual
deploy_doc

00:00:07