Log Message:
www/ruby-rack: update to 3.1.3

3.1.1 (2024-06-11)

* Oops! I shouldn't have shipped that

3.1.2 (2024-06-11)

* Rack::Response will take in to consideration chunked encoding responses
  (#2204, [@tenderlove])

3.1.3 (2024-06-12)

Fixed

* Fix passing non-strings to Rack::Utils.escape_html. (#2202, [@earlopain])
* Rack::MockResponse gracefully handles empty cookies (#2203
  @wynksaiddestroy)