Update font-weight on countdown

Author: kkartunov

src/shared/components/Countdown/themes/TCO21.scss

@@ -56,6 +56,7 @@ $container-background-yello: #fce217;
   .time-label {
     color: #2a2a2a;
     font-size: 14px;
+    font-weight: 500;
     letter-spacing: 0.5px;
     line-height: 18px;
     text-align: center;