message: Fix default query example for ES5
  Using this example with ES5 was returning an error from the server.
diff: @@ -7,17 +7,15 @@ Sometimes we need to apply a default query which affects the entire search and i
  import {
  SearchkitManager,
  TermQuery,
  - FilteredQuery,
  - BoolShould
  + BoolMust
  }
  const searchkit = new SearchkitManager("/")
  searchkit.addDefaultQuery((query)=> {
  - return query.addQuery(FilteredQuery({
  - filter:BoolShould([
  + return query.addQuery(BoolMust([
  TermQuery("colour", "red"),
  TermQuery("colour", "orange")
  ])
  - }))
  + );
  })
  ```
  