Update docs/monthly-meeting/2025-09.md

Co-authored-by: Ezio Melotti <[email protected]>

Author: StanFromIreland

docs/monthly-meeting/2025-09.md

@@ -9,7 +9,7 @@
 - Carol Willing / `@willingc`
 - Adam Turner / `@AA-Turner`
 - Lufti Zuchri
-- Irvan Putra / `irvan-putra` / `irvan.putra`
+- Irvan Putra / `@irvan-putra` / `irvan.putra`
 - Jacob Coffee / `@JacobCoffee`
 - Stan Ulbrych / `@StanFromIreland`