Update workflows/agentic-wiki-writer.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: mrjf

workflows/agentic-wiki-writer.md

@@ -36,6 +36,7 @@ tools:
     max-file-count: 50
   github:
     toolsets: [repos]
+  write: {}
 safe-outputs:
   create-pull-request:
     title-prefix: "[agentic-wiki]"