Add spinning icon to indicate code-owners are loading

Release-Notes: skip
Change-Id: I5d00c7350aca29172382c99353f155408db1b9cd
diff --git a/web/suggest-owners.ts b/web/suggest-owners.ts
index fbda31c..4fe2a7d 100644
--- a/web/suggest-owners.ts
+++ b/web/suggest-owners.ts
@@ -362,7 +362,7 @@
     if (!isLoading) return nothing;
     return html`
       <p class="loading">
-        <span class="loadingSpin"></span>
+        <span class="loadingSpin"><gr-icon icon="sync"></gr-icon></span>
         ${this.selectedSuggestionsLoadProgress}
       </p>
     `;