Document Issue - retire DNG

[jgunstone]

project_number: 4321
name: document-issue
project_drivers:
  - efficiency
  - quality
  - data-insights
director: KD
client: XX
stakeholders:
  - PL
  - EC
  - LH
  - AM
  - CH
delivery: 
  - JG
  - OH

see https://wiki.maxfordham.com/Main/4321Q010UpgradedDocNumbering