Bump nokogiri from 1.18.8 to 1.18.9 in /samples/round_info

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.18.8 to 1.18.9.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md)
- [Commits](sparklemotion/nokogiri@v1.18.8...v1.18.9)

---
updated-dependencies:
- dependency-name: nokogiri
  dependency-version: 1.18.9
  dependency-type: indirect
...

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

Author: dependabot[bot]

samples/round_info/Gemfile.lock

@@ -39,10 +39,10 @@ GEM
     loofah (2.23.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
-    mini_portile2 (2.8.8)
+    mini_portile2 (2.8.9)
     minitest (5.24.1)
     multipart-post (2.1.1)
-    nokogiri (1.18.8)
+    nokogiri (1.18.9)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
     public_suffix (4.0.6)