Add NatWest Group as Known Instance across three patterns

[rrrutledge]

Summary

From Pooi Ling Cheong's InnerSource Commons Community Call talk "Growing InnerSource through OSPO Enablement" (October 6, 2026).
Pooi is the InnerSource lead at NatWest Group, where the OSPO groups its work into four themes: awareness, discoverability, enablement, and community.
Only the recorded talk is cited; the Q&A ran under the Chatham House Rule.
This PR adds three Known Instances and one Resulting Context bullet:

• InnerSource Portal - adds NatWest Group as a Known Instance: projects self-register by adding an InnerSource tag in the existing Engineering Portal's software catalog, and a follow-up communications campaign grew the catalog to over 40 projects (the outcome the pattern's "communications campaign" advice predicts)
• Standard Base Documentation - adds NatWest Group as a Known Instance: an OSPO blueprint embeds the base documentation standards, backed by a readiness assessment with must-have and nice-to-have recommendations
• Standard Base Documentation - adds one Resulting Context bullet: when many projects follow the same standard, contributors moving between projects find the same information in the same place, which lowers the cost of each new project they engage with
• Praise Participants - adds NatWest Group as a Known Instance: Contributor Recognition Awards presented at the quarterly internal InnerSource meetup

The talk's video isn't published yet, so the citations name the call without a link; a follow-up commit adds the link once it is on the InnerSource Commons YouTube channel.

Test plan

• Add the video link to all three citations once the recording is published
• Confirm the Known Instance entries match the surrounding formatting style
• Confirm the new Standard Base Documentation Resulting Context bullet reads as a natural extension of the existing ones

🤖 Generated with Claude Code

https://claude.ai/code/session_01QLLkUURGbsa8r5Xzq4xNGP