fix(gallery-toolbar): content must be static

Author: marcjulian

projects/core/src/lib/gallery/gallery-toolbar/gallery-toolbar.component.ts

@@ -12,7 +12,7 @@ import {
   styleUrls: ['./gallery-toolbar.component.scss']
 })
 export class FivGalleryToolbar implements OnInit {
-  @ViewChild(TemplateRef, { static: false }) content: TemplateRef<any>;
+  @ViewChild(TemplateRef, { static: true }) content: TemplateRef<any>;
   @Input() position: 'top' | 'bottom' = 'top';
 
   constructor() {}