Update 02-ngif-highligh-entire-row.md

Updated <table-dark> to support Bootstrap 5

Author: darbyluv2code

bonus-content/angular-crash-course/02-ngIf-highlight-entire-row/02-ngif-highligh-entire-row.md

@@ -65,7 +65,7 @@ The final code for [sales-person-list-bootstrap.component.html](code/sales-perso
 ```html
 <table class="table">
 
-    <thead class="thead-dark">
+    <thead class="table-dark">
         <tr>
             <th>First Name</th>
             <th>Last Name</th>