Add digest to Admin DomainBlockResource, coming in Mastodon 4.3

app/Http/Resources/MastoApi/Admin/DomainBlockResource.php

@@ -24,6 +24,9 @@ class DomainBlockResource extends JsonResource
         return [
             'id' => $this->id,
             'domain' => $this->domain,
+            // This property is coming in Mastodon 4.3, although it'll only be
+            // useful if Pixelfed supports obfuscating domains:
+            'digest' => hash('sha256', $this->domain),
             'severity' => $severity,
             // Using the updated_at value as this is going to be the closest to
             // when the domain was banned