Update default gems list at 3f960cf [ci skip]

Author: matzbot

NEWS.md

@@ -243,7 +243,7 @@ Note: We're only listing outstanding class updates.
     * RubyGems 3.4.0.dev
     * bigdecimal 3.1.2
     * bundler 2.4.0.dev
-    * cgi 0.3.3
+    * cgi 0.3.4
     * date 3.2.3
     * erb 3.0.0
     * error_highlight 0.5.1