www/ruby-mechanize: update to 2.85

2.8.4 (2022-01-17)

Fix

* Mechanize::CookieJar#load calls Psych.safe_load when using Psych >= 3.1

2.8.5 (2022-06-09)

Security

Fixes low-severity CVE-2022-31033, "Authorization header leak on port
redirect." See GHSA-64qm-hrgp-pgr9 for more details.

(taca)