outlook web dark mode layout border fix (#45024)

Author: 0x1stvan

src/Illuminate/Mail/resources/views/html/layout.blade.php

@@ -33,7 +33,7 @@
 
 <!-- Email Body -->
 <tr>
-<td class="body" width="100%" cellpadding="0" cellspacing="0">
+<td class="body" width="100%" cellpadding="0" cellspacing="0" style="border: hidden !important;">
 <table class="inner-body" align="center" width="570" cellpadding="0" cellspacing="0" role="presentation">
 <!-- Body content -->
 <tr>