Bump cgi from 0.4.1 to 0.4.2 (#8325)

Bumps [cgi](https://github.com/ruby/cgi) from 0.4.1 to 0.4.2.
- [Release notes](https://github.com/ruby/cgi/releases)
- [Commits](https://github.com/ruby/cgi/compare/v0.4.1...v0.4.2)

---
updated-dependencies:
- dependency-name: cgi
  dependency-type: indirect
...

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Gemfile.lock

@@ -225,7 +225,7 @@ GEM
       marcel (~> 1.0)
       nokogiri (~> 1.10, >= 1.10.4)
       rubyzip (>= 1.3.0, < 3)
-    cgi (0.4.1)
+    cgi (0.4.2)
     childprocess (4.1.0)
     chunky_png (1.4.0)
     coderay (1.1.3)