Bump nokogiri from 1.13.5 to 1.13.6 in /examples/ruby (SeleniumHQ#1022)

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.13.5 to 1.13.6.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md)
- [Commits](sparklemotion/nokogiri@v1.13.5...v1.13.6)

---
updated-dependencies:
- dependency-name: nokogiri
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Diego Molina <[email protected]>

Author: dependabot[bot]

examples/ruby/Gemfile.lock

@@ -3,9 +3,9 @@ GEM
   specs:
     childprocess (4.1.0)
     diff-lcs (1.5.0)
-    nokogiri (1.13.5-x86_64-darwin)
+    nokogiri (1.13.6-x86_64-darwin)
       racc (~> 1.4)
-    nokogiri (1.13.5-x86_64-linux)
+    nokogiri (1.13.6-x86_64-linux)
       racc (~> 1.4)
     racc (1.6.0)
     rake (13.0.6)