site/events.html: fix error from bootlint.

E013 Only columns (`.col-*-*`) may be children of `.row`s

Should be in b15bea1 commit.

No functional changes.

Author: php-coder

src/main/webapp/WEB-INF/views/site/events.html

@@ -96,7 +96,7 @@ <h3 class="text-center" th:text="${#strings.capitalize(suspicious_activities)}">
 					</div>
 					/*/-->
 					<div th:if="${not #lists.isEmpty(activities)}" class="row">
-						<div class="table-responsive">
+						<div class="col-sm-12 table-responsive">
 							<table class="table table-bordered table-striped">
 								<thead>
 									<tr>