chore: update example site

exampleSite/config/_default/markup.toml

@@ -0,0 +1,12 @@
+[goldmark]
+[goldmark.extensions]
+definitionList = true
+footnote = true
+linkify = true
+strikethrough = true
+table = true
+taskList = true
+typographer = true
+[goldmark.renderer]
+# whether to use HTML tags directly in the document
+unsafe = true