Updated marked to allow escaping pipe characters and to restrict reference links (#5278)

webapp/package.json

@@ -16,7 +16,7 @@
     "intl": "1.2.5",
     "jasny-bootstrap": "3.1.3",
     "jquery": "3.1.1",
-    "marked": "mattermost/marked#1adb66d8df3d582f4434e8e6cd401715463643d9",
+    "marked": "mattermost/marked#328857681dcc98a3d75633d6c0effa7c29b6cceb",
     "match-at": "0.1.0",
     "object-assign": "4.1.0",
     "pdfjs-dist": "1.6.319",