Write an updated draft for the 'Help users navigate a service' pattern.
Why
'More agile' release includes some new decisions for how the header and navigation components work together – particularly placement of service name and navigation links.
Also adds a few new pieces of advice.
Who needs to be involved
Content designer
Who needs to review
All squad
### Tasks
- [x] Add guidance for external links
- [x] Update guidance on where to place service name
What
Write an updated draft for the 'Help users navigate a service' pattern.
Why
'More agile' release includes some new decisions for how the header and navigation components work together – particularly placement of service name and navigation links.
Also adds a few new pieces of advice.
Who needs to be involved
Content designer
Who needs to review
All squad