fix(tabs): fix accidentally setting top instead of width after removing Renderer use (#8602)

Author: jelbourn

src/lib/tabs/ink-bar.ts

@@ -59,6 +59,6 @@ export class MatInkBar {
     const inkBar: HTMLElement = this._elementRef.nativeElement;
 
     inkBar.style.left = element ? (element.offsetLeft || 0) + 'px' : '0';
-    inkBar.style.top = element ? (element.offsetWidth || 0) + 'px' : '0';
+    inkBar.style.width = element ? (element.offsetWidth || 0) + 'px' : '0';
   }
 }