fix: use the optional tag when property on class is optional (#738)

Author: crowlKats

src/html/symbols/class.rs

@@ -429,7 +429,7 @@ fn render_class_property(
     tags.insert(Tag::Readonly);
   }
   if property.optional {
-    tags.insert(Tag::Abstract);
+    tags.insert(Tag::Optional);
   }
 
   let ts_type = property

tests/snapshots/html_test__html_doc_files_multiple-23.snap

@@ -410,7 +410,7 @@ Properties</h2></div><div class="space-y-8"><div class="anchorable docEntry" id=
 <div class="anchorable docEntry" id="property_foo">
 
   <div class="docEntryHeader">
-    <div><div class="space-x-1 mb-1"><div class="text-abstract border border-abstract/50 bg-abstract/5 inline-flex items-center gap-0.5 *:flex-none rounded-md leading-none text-sm py-1 px-2">abstract</div>
+    <div><div class="space-x-1 mb-1"><div class="text-optional border border-optional/50 bg-optional/5 inline-flex items-center gap-0.5 *:flex-none rounded-md leading-none text-sm py-1 px-2">optional</div>
 </div><code><a href="#property_foo" class="anchor" aria-label="Anchor" tabIndex="-1"><svg
   width="16"
   height="16"

tests/snapshots/html_test__symbol_group.snap

@@ -1508,7 +1508,7 @@ expression: files
                           },
                           "tags": [
                             {
-                              "kind": "abstract"
+                              "kind": "optional"
                             }
                           ],
                           "js_doc": null,