แก้สีปุ่มย้อนกลับ

src/app/components/competency-management/group-competencies/edit-group-competencies/edit-group-competencies.component.html

 <div class="flex items-center py-4 border-b-2 border-collapse ">
-    <button type="button" class="ti-btn bg-gray-300 h-20px m-0 shadow-md text-blue-500" (click)="onBack()">
+    <button type="button" class="ti-btn ti-btn-outline ti-btn-outline-light h-20px m-0 shadow-md text-blue-500" (click)="onBack()">
         <i class="ri-arrow-left-s-line"></i> ย้อนกลับ
     </button>
     <div class="text-2xl font-bold py-2 text-primary px-4 ">