Update list component usage to reflect breaking change

govuk_publishing_components version 48.0.0 added the component wrapper
to the list component [^1] requiring usage to reflect the component wrapper [^2]
which replaces the `aria_label` option with `aria` as a hash containing multiple
properties.

[^1]: Changelog https://github.com/alphagov/govuk_publishing_components/blob/main/CHANGELOG.md#4800
[^2]: Component wrapper helper docs https://github.com/alphagov/govuk_publishing_components/blob/main/docs/component-wrapper-helper.md

app/views/admin/governments/prepare_to_close.html.erb

@@ -9,7 +9,9 @@
     } %>
 
     <%= render "govuk_publishing_components/components/list", {
-      aria_label: "A list of active ministerial appointments.",
+      aria: {
+        label: "A list of active ministerial appointments.",
+      },
       visible_counters: true,
       extra_spacing: true,
       margin_bottom: 8,