Merge branch 'dependabot/bundler/nokogiri-1.18.8' of 'https://github.com/chaoss/grimoirelab-tutorial'

Merges #240
Closes #240

Author: sduenas

Gemfile.lock

@@ -229,7 +229,7 @@ GEM
       jekyll-seo-tag (~> 2.1)
     minitest (5.25.1)
     multipart-post (2.1.1)
-    nokogiri (1.16.5-x86_64-linux)
+    nokogiri (1.18.8-x86_64-linux-gnu)
       racc (~> 1.4)
     octokit (4.21.0)
       faraday (>= 0.9)