groups: Add anlambert to swhwebapp
groups: Add anlambert to swhwebapp

In order to easily read webapp logs.

SoftwareHeritage/puppet-swh-site,SoftwareHeritage/puppet-swh-site,SoftwareHeritage/puppet-swh-site,SoftwareHeritage/puppet-swh-site,SoftwareHeritage/puppet-swh-site