chore: Align date time select extension filename and const

Author: adzap

lib/validates_timeliness/extensions.rb

@@ -1,11 +1,11 @@
 module ValidatesTimeliness
   module Extensions
-    autoload :TimelinessDateTimeSelect, 'validates_timeliness/extensions/date_time_select'
+    autoload :DateTimeSelect, 'validates_timeliness/extensions/date_time_select'
   end
 
   def self.enable_date_time_select_extension!
     require 'uri' # Do we need this? No, but the test suite fails without it.
-    ::ActionView::Helpers::Tags::DateSelect.send(:prepend, ValidatesTimeliness::Extensions::TimelinessDateTimeSelect)
+    ::ActionView::Helpers::Tags::DateSelect.send(:prepend, ValidatesTimeliness::Extensions::DateTimeSelect)
   end
 
   def self.enable_multiparameter_extension!

lib/validates_timeliness/extensions/date_time_select.rb

@@ -1,6 +1,6 @@
 module ValidatesTimeliness
   module Extensions
-    module TimelinessDateTimeSelect
+    module DateTimeSelect
       # Intercepts the date and time select helpers to reuse the values from
       # the params rather than the parsed value. This allows invalid date/time
       # values to be redisplayed instead of blanks to aid correction by the user.