Update JMS membership

Author: jasongrout

docs/_data/contributors.yml

@@ -143,6 +143,7 @@ authors:
         term: "2024-2025"
       - team: trademark_subcommittee
       - team: community_building_working_group
+      - team: media_strategy_working_group
       - team: former_steering_council
         term: "2015-2022"