Bump nokogiri from 1.10.7 to 1.10.8 in /ansible/docker/rzz

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.10.7 to 1.10.8.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sparklemotion/nokogiri/compare/v1.10.7...v1.10.8)

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

ansible/docker/rzz/Gemfile.lock

@@ -8,7 +8,7 @@ GEM
       rb-inotify (~> 0.9, >= 0.9.10)
     method_source (0.9.2)
     mini_portile2 (2.4.0)
-    nokogiri (1.10.7)
+    nokogiri (1.10.8)
       mini_portile2 (~> 2.4.0)
     pry (0.12.2)
       coderay (~> 1.1.0)