Bump public_suffix from 4.0.5 to 4.0.6

Bumps [public_suffix](https://github.com/weppos/publicsuffix-ruby) from 4.0.5 to 4.0.6.
- [Release notes](https://github.com/weppos/publicsuffix-ruby/releases)
- [Changelog](https://github.com/weppos/publicsuffix-ruby/blob/master/CHANGELOG.md)
- [Commits](weppos/publicsuffix-ruby@v4.0.5...v4.0.6)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

Gemfile.lock

@@ -227,7 +227,7 @@ GEM
     pry-stack_explorer (0.5.1)
       binding_of_caller (~> 0.7)
       pry (~> 0.13)
-    public_suffix (4.0.5)
+    public_suffix (4.0.6)
     puma (4.3.5)
       nio4r (~> 2.0)
     puma_worker_killer (0.2.0)