test: 💍 fix byRole test due to stricter aria-query

BREAKING CHANGE: 🧨 stricter aria-query

Author: chimurai

projects/spectator/test/dom-selectors/dom-selectors.component.ts

@@ -20,7 +20,7 @@ export class DomSelectorsNestedComponent {}
 
     <img src="" alt="By alt text" id="by-alt-text-img" />
 
-    <a href="" title="By title" id="by-title-a"></a>
+    <a href="#" title="By title" id="by-title-a"></a>
 
     <input type="text" value="By value" id="by-value-input" />