Update site.css

Author: Youssef1313

src/ProjectTemplates/Web.ProjectTemplates/content/StarterWeb-CSharp/wwwroot/css/site.css

@@ -12,6 +12,13 @@ html {
   box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
 }
 
+.navbar-light .navbar-brand:focus-visible, .navbar-light .navbar-nav .nav-link:focus-visible {
+  outline: 2px solid #212529;
+  outline-offset: 2px;
+  border-radius: 2px;
+  box-shadow: none;
+}
+
 html {
   position: relative;
   min-height: 100%;