chore: Update MAINTAINERS.md (#1412)

Signed-off-by: Jessica G <[email protected]>

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-sdk-go-maintainers` |
+|        Scope        |            Definition             | GitHub Role |        GitHub Team         |
+|---------------------|-----------------------------------|-------------|----------------------------|
+| project-maintainers | The Maintainers of the project    | Maintain    | `hiero-sdk-go-maintainers` |
+| tsc                 | The Hiero TSC                     | Maintain    | `tsc`                      |
+| github-maintainers  | The Maintainers of the github org | Maintain    | `github-maintainers`       |
 
 ## Active Maintainers