Remove quotes from archetype front matter dates.

archetypes/posts.md

@@ -6,9 +6,9 @@ title: "{{ replace .Name "-" " " | title }}"
 subtitle: ""
 feathericon: ""
 author: authorDefault
-#started: "{{ .Date }}"
-date:    "{{ .Date }}"
-#lastmod: "{{ .Date }}"
+#started: {{ .Date }}
+date:    {{ .Date }}
+#lastmod: {{ .Date }}
 toc: false
 audio: false
 images: