doc/admin.md: 'Creating an organization', some rewording

Summoned from 2017 (a4990001)
4 jobs for doc/manage-organizations in 2 minutes and 31 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Test Tools
passed #887743
test_tools

00:00:09

 
  Test Quality
failed #887744
allowed to fail
code_quality

00:00:05

 
  Tgz Release
passed #887745
cidocker
build_doc

00:02:21

 
  Deploy Prod
manual #887746
allowed to fail manual
deploy_doc
 
Name Stage Failure
failed
code_quality Test Quality
$ function propagate_env_vars() { # collapsed multi-line command
$ docker pull --quiet "$CODE_QUALITY_IMAGE"
unknown flag: --quiet
See 'docker pull --help'.
Uploading artifacts...
Runtime platform arch=386 os=linux pid=7650 revision=58272c27 version=12.7.0
WARNING: gl-code-quality-report.json: no matching files
ERROR: No files to upload
ERROR: Job failed: exit status 1