Update install.html

src/install/install.html

@@ -27,7 +27,7 @@
 				</div>
 			</div>
 		</div>
-		<div class="install-box my-3">
+		<div class="install-box py-3">
 			<div class="container">
 				<?php if (count($arrMsg) > 0) {foreach($arrMsg as $msg){?>
 				<div class="alert alert-warning"><?php echo $msg ?></div>