Update CodeIgniter documentation (4.1.5)

assets/javascripts/templates/pages/about_tmpl.coffee

@@ -183,7 +183,7 @@ credits = [
     'https://raw.githubusercontent.com/Codeception/CodeceptJS/master/LICENSE'
   ], [
     'CodeIgniter',
-    '2014-2020 British Columbia Institute of Technology',
+    '2014-2021 British Columbia Institute of Technology',
     'MIT',
     'https://raw.githubusercontent.com/bcit-ci/CodeIgniter/develop/license.txt'
   ], [

lib/docs/scrapers/codeigniter.rb

@@ -29,13 +29,13 @@ module Docs
     ]
 
     options[:attribution] = <<-HTML
-      &copy; 2014&ndash;2020 British Columbia Institute of Technology<br>
+      &copy; 2014&ndash;2021 British Columbia Institute of Technology<br>
       Licensed under the MIT License.
     HTML
 
     version '4' do
-      self.release = '4.0.4'
-      self.base_url = 'https://codeigniter.com/userguide4/'
+      self.release = '4.1.5'
+      self.base_url = 'https://codeigniter.com/user_guide/'
 
       options[:container] = '.document > div'
     end