Update dependency pygments.rb to v2.4.1

Author: renovate[bot]

Gemfile.lock

@@ -133,7 +133,7 @@ GEM
       forwardable-extended (~> 2.6)
     posix-spawn (0.3.15)
     public_suffix (5.0.3)
-    pygments.rb (2.4.0)
+    pygments.rb (2.4.1)
     racc (1.7.1)
     rainbow (3.1.1)
     rake (13.0.6)