Update CONTRIBUTOR_LADDER.md

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

Author: aepfli

CONTRIBUTOR_LADDER.md

@@ -211,6 +211,7 @@ Process of becoming a maintainer:
 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.
+Frequently, members are granted this permission after reaching `maintainer` in numerous repositories.
 This role is reserved for contributors who have demonstrated exceptional dedication and capability across multiple areas of the project.
 
 - **Requirements**: