Add a-akimov to maintainers

a-akimov already held ROLE_IDS.DOCS_MAINTAINERS. Add ROLE_IDS.MAINTAINERS
to the entry so they join the maintainers GitHub team, Discord role and
Google group, matching #188 (sarahnovotny) and #187.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Di1nHXdz82X7NyZKqW3gvt

Author: claude

src/config/users.ts

@@ -17,7 +17,7 @@ export const MEMBERS: readonly Member[] = [
   {
     github: 'a-akimov',
     discord: '1365254196621738116',
-    memberOf: [ROLE_IDS.DOCS_MAINTAINERS],
+    memberOf: [ROLE_IDS.DOCS_MAINTAINERS, ROLE_IDS.MAINTAINERS],
   },
   {
     github: 'aaronpk',