style(confirmation-modal): update button styles in modal

src/app/confirmation-modal/confirmation-modal.component.html

@@ -1,6 +1,6 @@
 <h2 mat-dialog-title>{{ data.title }}</h2>
 <mat-dialog-content>{{ data.description }}</mat-dialog-content>
 <mat-dialog-actions>
+  <button [style.backgroundColor]="'#FFFFFF'" [style.color]="'#000000'" mat-stroked-button color="warn" (click)="accept()">Yes</button>
   <button mat-flat-button (click)="close()">No</button>
-  <button mat-flat-button color="warn" (click)="accept()">Yes</button>
 </mat-dialog-actions>