Merge branch 'main' into glitch-soc/merge-upstream

Conflicts:
- `README.md`:
  Upstream changed their README, we have our own.
  Kept ours.
- `app/helpers/application_helper.rb`:
  Minor code style fix upstream, on a line that is different in glitch-soc
  due to the different theming system.
  Applied the code style fix to our own code.
- `app/views/settings/preferences/appearance/show.html.haml`:
  Code style fix on a line next to lines exclusive to glitch-soc.
  Applied upstream changes.
- `yarn.lock`:
  Upstream updated a dependency textually close to a glitch-soc-only
  dependency.
  Updated the dependency like upstream did.

app/views/admin/accounts/show.html.haml

@@ -187,7 +187,7 @@
             %th= t('admin.accounts.shared_inbox_url')
             %td
               = @account.shared_inbox_url
-              = fa_icon DeliveryFailureTracker.available?(@account.shared_inbox_url) ? 'check': 'times'
+              = fa_icon DeliveryFailureTracker.available?(@account.shared_inbox_url) ? 'check' : 'times'
             %td
               - if @domain_block.nil?
                 = table_link_to 'ban', t('admin.domain_blocks.add_new'), new_admin_domain_block_path(_domain: @account.domain)