message: docs(demo): update frontmatter key
diff: @@ -6,7 +6,7 @@ title: page config
  # Set author
  author: Ms.Hope
  # Set writing time
  -time: 2020-01-01
  +date: 2020-01-01
  # A page can only have one category
  category: Guide
  # A page can have multiple tags
  