chore: Update MAINTAINERS.md (#3864)

Author: jwagantall

MAINTAINERS.md

@@ -6,9 +6,11 @@ The general handling of Maintainer rights and all groups in this GitHub org is d
 
 Maintainers are assigned the following scopes in this repository:
 
-| Scope      | Definition               | GitHub Role | GitHub Team                        |
-| ---------- | ------------------------ | ----------- | ---------------------------------- |
-| Maintainer | The GitHub Maintain role | Maintain    | `hiero-json-rcp-relay-maintainers` |
+|        Scope        |            Definition             | GitHub Role |            GitHub Team             |
+|---------------------|-----------------------------------|-------------|------------------------------------|
+| project-maintainers | The Maintainers of the project    | Maintain    | `hiero-json-rcp-relay-maintainers` |
+| tsc                 | The Hiero TSC                     | Maintain    | `tsc`                              |
+| github-maintainers  | The Maintainers of the github org | Maintain    | `github-maintainers`               |
 
 ## Active Maintainers