Update to patterns

Quick update on pattern progress as it has been quiet lately given the core team have been very busy.

• The DMZ pattern has been promoted from draft
• Board of Directors pattern requires a few small updates to bring into line with the standard template then will be finalised.
• We are working an Industrial Process Automation pattern and should have a draft ready for comment in coming weeks
• 2 other patterns are pending owners: Secure Network Zone and Consumer Devices

All work is credited back to originators.