message: Update inferred-rules.md
  add required rule to Inferred Rules Reference table for completion
diff: @@ -42,6 +42,7 @@ This is a table of HTML attributes that is inferred as rules.
  | min | val | min_value: val |
  | max | val | max_value: val |
  | pattern | rgx | regex: rgx |
  +| required | _none_ | required |
  ::: tip
  This feature does not work on custom components, only HTML5 inputs can take advantage from this feature.
  