fix(contributors): tweak the language a bit

Author: billhimmelsbach

src/stories/Governance.mdx

@@ -39,7 +39,7 @@ The responsibilities of the core contributors can include:
 - Triaging security issues and bugs
 - Updating documentation and helping onboard new users and projects
 
-For a full list of contributors, see the [GitHub repository](https://github.com/cfpb/design-system-react/graphs/contributors).
+For a full list of past and current contributors, see the [GitHub repository](https://github.com/cfpb/design-system-react/graphs/contributors).
 
 <Heading type='2'>Meetings</Heading>