[ruby/date] Bump version to 3.2.2

https://github.com/ruby/date/commit/21d91c5f4f
2021-11-18 18:18:33 +09:00 · 2021-11-18 18:18:33 +09:00 · 39655aceb2
--- a/ext/date/lib/date.rb
+++ b/ext/date/lib/date.rb
@ -4,7 +4,7 @@
 require 'date_core'

 class Date
-  VERSION = '3.2.1' # :nodoc:
+  VERSION = '3.2.2' # :nodoc:

  def infinite?
    false