message: Fixing the issue associated with the Regex performance change
diff: @@ -7,7 +7,7 @@ Tantivy 0.11.0
  - Better handling of whitespaces.
  - Closes #498 - add support for Elastic-style unbounded range queries for alphanumeric types eg. "title:>hello", "weight:>=70.5", "height:<200" (@petr-tik)
  - API change around `Box<BoxableTokenizer>`. See detail in #629
  -- Avoid rebuilding Regex automaton whenever a regex query is reused. #630 (@brainlock)
  +- Avoid rebuilding Regex automaton whenever a regex query is reused. #639 (@brainlock)
  - Add footer with some metadata to index files. #605 (@fdb-hiroshima)
  ## How to update?
  