message: Fix table formatting in CHANGELOG.md
diff: @@ -308,6 +308,7 @@ This change log follows the format documented in [Keep a CHANGELOG].
  Instead, argument is converted beforehand using `toDate`.
  Examples:
  +
  | `isValid` argument | Before v2.0.0 | v2.0.0 onward |
  |---------------------------|---------------|---------------|
  | `new Date()` | `true` | `true` |
  