Add new pattern to overview (README)

Author: spier

README.md

@@ -87,6 +87,7 @@ Our mission
 * [Code of Conduct](/patterns/1-initial/code-of-conduct.md) - *Communications and interactions between collaborators are rude, not inclusive or offensive, harming and increasing the discussions without any value added. A Code of Conduct provides guidelines for establishing rules and expectations regarding behavior and interactions within the community to build stronger levels of collaboration.*
 * [Trusted Committer and Contributor Retrospectives](/patterns/1-initial/cross-team-retrospectives.md) - *A host team working with contributors outside of their own line of management constantly runs into misunderstandings. As a result collaboration becomes brittle and frustrating. Setting aside time for regular retrospectives for the InnerSource team consisting of trusted committers and contributors can help make communication smooth.*
 * [InnerSource Hackathon](/patterns/1-initial/innersource-hackathon.md) - *In a company, initially only InnerSource enthusiasts are interested and practicing InnerSource during the early stages of InnerSource adoption; not all engineering teams are willing or have enough time and resources to adopt InnerSource. In this scenario, it is good to provide a safe space to try and adopt InnerSource through an InnerSource Hackathon event within the company.*
+* [InnerSource Ambassadors](/patterns/1-initial/innersource-hackathon.md) - *When driving InnerSource adoption through a large, decentralized organization it is hard to understand and address the local challenges that come up in different departments and regions. Local volunteers, called InnerSource Ambassadors, provide localized support by promoting InnerSource principles and acting as a communication bridge between their teams and the ISPO.*
 
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 NOTE: The 'Initial' Patterns below don't have a Patlet yet, which is essential for readers to quickly browse our patterns.