add trailing slash to conf link

Author: lynnandtonic

src/site/_includes/header.njk

@@ -1,7 +1,7 @@
 {%
   set linkList = [
     { "url": "/", "text": "Home" },
-    { "url": "/conf", "text": "Jamstack Conf 2022" },
+    { "url": "/conf/", "text": "Jamstack Conf 2022" },
     { "url": "/glossary/", "text": "Glossary" },
     { "url": "/women-of-jamstack/", "text": "Women of Jamstack"},
     { "url": "/tv/", "text": "Jamstack TV" },