feat: proposed status tooltip

client/agenda/AgendaScheduleList.vue

@@ -90,7 +90,7 @@
                 )
                 template(#trigger)
                   span.badge.is-proposed Proposed
-                span Proposed sessions are not yet approved and may not occur. Text TBD
+                span #[a(href='https://www.ietf.org/process/wgs/', target='_blank') Proposed WGs] are groups in the process of being chartered. If the charter is not approved by the IESG before the IETF meeting, the session may be canceled.
               .agenda-table-note(v-if='item.note')
                 i.bi.bi-arrow-return-right.me-1
                 span {{item.note}}