build(deps): bump nokogiri from 1.19.1 to 1.19.4 in /auth0_flutter/example/ios (#873)

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

Author: dependabot[bot]

auth0_flutter/example/ios/Gemfile.lock

@@ -31,10 +31,10 @@ GEM
     mini_portile2 (2.8.9)
     minitest (5.27.0)
     nanaimo (0.3.0)
-    nokogiri (1.19.1)
+    nokogiri (1.19.4)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
-    nokogiri (1.19.1-x86_64-darwin)
+    nokogiri (1.19.4-x86_64-darwin)
       racc (~> 1.4)
     racc (1.8.1)
     rexml (3.4.2)