Fix health check link (#17828)

"Back to overview" would push the wrong url to the history, which would break things if you reloaded your page

src/Umbraco.Web.UI.Client/src/packages/health-check/views/health-check-group.element.ts

@@ -59,7 +59,7 @@ export class UmbDashboardHealthCheckGroupElement extends UmbLitElement {
 	}
 
 	override render() {
-		return html` <a href="/section/settings/dashboard/health-check"> &larr; Back to overview </a>
+		return html` <a href="section/settings/dashboard/health-check"> &larr; Back to overview </a>
 			${this._group ? this.#renderGroup() : nothing}`;
 	}