fix(committee-config): correct broken handles and complete roster

ruebot -> nicholas-ruest (canonical AF/org account)
mrjcleaver2 -> mrjcleaver (mrjcleaver2 is a dead 404 handle)
add shaal (Ofer Shaal) and inde5media (Mat Mathews), both PR #6 assignees
drop ransonrob (dead 404 handle, no repo access; re-add when confirmed)

All five logins verified via gh api users/<h> and confirmed as
community-projects collaborators with push/triage. The /score workflow
gates on this roster, so the prior config (2 dead handles, 2 missing
members) would reject real committee scorers.

Author: michaeloboyle

data/committee-config.json

@@ -3,8 +3,9 @@
   "quorum_rule": "simple_majority",
   "members": [
     {"login": "michaeloboyle", "name": "Michael O'Boyle", "role": "chair"},
-    {"login": "ruebot", "name": "Nick Ruest", "role": "member"},
-    {"login": "mrjcleaver2", "name": "Martin Cleaver", "role": "member"},
-    {"login": "ransonrob", "name": "Robert Ranson", "role": "member"}
+    {"login": "nicholas-ruest", "name": "Nick Ruest", "role": "member"},
+    {"login": "mrjcleaver", "name": "Martin Cleaver", "role": "member"},
+    {"login": "shaal", "name": "Ofer Shaal", "role": "member"},
+    {"login": "inde5media", "name": "Mat Mathews", "role": "member"}
   ]
 }