Table: fix the empty table column cell element

.changeset/early-rabbits-double.md

@@ -0,0 +1,5 @@
+---
+"@ithaka/pharos": patch
+---
+
+Fix empty table column header cell

packages/pharos/src/components/table/pharos-table.ts

@@ -136,7 +136,7 @@ export class PharosTable extends ScopedRegistryMixin(PharosElement) {
       if (column.name) {
         return html`<th scope="col">${column.name}</th>`;
       } else {
-        return html`<tb></tb>`;
+        return html`<td></td>`;
       }
     });
   }