vidjil-algo.md: Works with g++-8

See #3598
6 jobs for dev in 6 minutes and 8 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test Tools
passed #281485
test_tools

00:00:06

 
  Test Quality
passed #281486
web
code_quality

00:00:13

 
  Test Unit
passed #281487
web
test_browser_unit

00:00:08

passed #281488
web
test_server_unit

00:00:15

 
  Test Functional
passed #281545
x86_64 docker
test_server_functional

00:05:32

failed #281489
docker x86_64
test_server_functional

00:01:08