Update CONTRIBUTOR_LADDER.md

Co-authored-by: Todd Baert <[email protected]>
Signed-off-by: Simon Schrottner <[email protected]>

Author: aepfli

CONTRIBUTOR_LADDER.md

@@ -208,7 +208,8 @@ Process of becoming a maintainer:
 
 ## Global Maintainer
 
-Global Maintainers are the top-level technical authority for the project, with **broad permissions** across all repositories.
+Global Maintainers are a technical authority for the project, with **broad permissions** across all repositories.
+Unlike the technical committee, global maintainers do not set policy, but otherwise have the same permissions.
 They oversee the health of the entire project and help facilitate cross-language and cross-repository collaboration.
 This role is reserved for contributors who have demonstrated exceptional dedication and capability across multiple areas of the project.