Upgrade Java SDK to spec 1.20.8-nightly.10

Author: ariesclark

docs/GroupPermissions.md

@@ -23,6 +23,8 @@
 
 * `group_instance_age_gated_create` (value: `"group-instance-age-gated-create"`)
 
+* `group_instance_announcement_create` (value: `"group-instance-announcement-create"`)
+
 * `group_instance_calendar_link` (value: `"group-instance-calendar-link"`)
 
 * `group_instance_join` (value: `"group-instance-join"`)

openapi.yaml

@@ -10426,6 +10426,7 @@ components:
         - group-default-role-manage
         - group-galleries-manage
         - group-instance-age-gated-create
+        - group-instance-announcement-create
         - group-instance-calendar-link
         - group-instance-join
         - group-instance-manage
@@ -10453,6 +10454,7 @@ components:
         - group_default_role_manage
         - group_galleries_manage
         - group_instance_age_gated_create
+        - group_instance_announcement_create
         - group_instance_calendar_link
         - group_instance_join
         - group_instance_manage