Mention lack of quotes for dates in docs

docs/content/documentation/content/page.md

@@ -22,6 +22,7 @@ description = ""
 
 # The date of the post.
 # 2 formats are allowed: YYYY-MM-DD (2012-10-02) and RFC3339 (2002-10-02T15:00:00Z)
+# Do not wrap dates in quotes, the line below only indicates that there is no default date
 date = ""
 
 # A draft page will not be present in prev/next pagination