Do not strip tags from Setting.site_short_description (#23975)

app/views/application/_sidebar.html.haml

@@ -3,7 +3,7 @@
     = image_tag @instance_presenter.thumbnail&.file&.url(:'@1x') || asset_pack_path('media/images/preview.png'), alt: @instance_presenter.title
 
   .hero-widget__text
-    %p= @instance_presenter.description.html_safe.presence || t('about.about_mastodon_html')
+    %p= @instance_presenter.description.presence || t('about.about_mastodon_html')
 
 - if Setting.trends && !(user_signed_in? && !current_user.setting_trends)
   - trends = Trends.tags.query.allowed.limit(3)

app/views/shared/_og.html.haml

@@ -1,5 +1,5 @@
 - thumbnail     = @instance_presenter.thumbnail
-- description ||= strip_tags(@instance_presenter.description.presence || t('about.about_mastodon_html'))
+- description ||= @instance_presenter.description.presence || strip_tags(t('about.about_mastodon_html'))
 
 %meta{ name: 'description', content: description }/