fix: lint issue in dropdown list

Author: rhythm55

src/dropdown/list/dropdown-list.component.ts

@@ -539,13 +539,13 @@ export class DropdownList implements AbstractDropdownView, AfterViewInit, OnDest
 			event.preventDefault();
 			if (event.key === "ArrowDown" || event.key === "Down") {
 				if (this.hasNextElement()) {
-					this.getNextElement().scrollIntoView({behavior: 'smooth',block: 'end'});
+					this.getNextElement().scrollIntoView({behavior: "smooth", block: "end"});
 				} else {
 					this.blurIntent.emit("bottom");
 				}
 			} else if (event.key === "ArrowUp" || event.key === "Up") {
 				if (this.hasPrevElement()) {
-					this.getPrevElement().scrollIntoView({behavior: 'smooth'});
+					this.getPrevElement().scrollIntoView({behavior: "smooth"});
 				} else {
 					this.blurIntent.emit("top");
 				}