Update demo.html

fix typo nit in page
diff --git a/erpnext/templates/pages/demo.html b/erpnext/templates/pages/demo.html
index 178ca28..f9934a3 100644
--- a/erpnext/templates/pages/demo.html
+++ b/erpnext/templates/pages/demo.html
@@ -62,7 +62,7 @@
 			{{ _("ERPNext Demo") }}</span>
 	</div>
 	<!-- <img src="/assets/erpnext/images/erp-icon.svg" style="max-width: 40px; max-height: 40px;"> -->
-	<p>Some functionality is disabled for the demo and the data will be cleared regulary.</p>
+	<p>Some functionality is disabled for the demo and the data will be cleared regularly.</p>
 	<div><button type="submit" id="login_btn" class="btn btn-primary btn-sm">Launch Demo</button></div>
 </div>