Update Erlang documentation (24.0)

Author: simon04

assets/javascripts/templates/pages/about_tmpl.coffee

@@ -283,7 +283,7 @@ credits = [
     'https://raw.githubusercontent.com/airbnb/enzyme/master/LICENSE.md'
   ], [
     'Erlang',
-    '2010-2020 Ericsson AB',
+    '2010-2021 Ericsson AB',
     'Apache',
     'https://raw.githubusercontent.com/erlang/otp/maint/LICENSE.txt'
   ], [

docs/file-scrapers.md

@@ -53,7 +53,7 @@ Go to https://www.erlang.org/downloads and download the HTML documentation file.
 
 ```ah
 mkdir --parent docs/erlang\~$VERSION/; \
-curl http://erlang.org/download/otp_doc_html_23.2.tar.gz | \
+curl http://erlang.org/download/otp_doc_html_$RELEASE.tar.gz | \
 bsdtar --extract --file - --directory=docs/erlang\~$VERSION/
 ```
 

lib/docs/scrapers/erlang.rb

@@ -36,10 +36,14 @@ class Erlang < FileScraper
     ]
 
     options[:attribution] = <<-HTML
-      &copy; 2010&ndash;2020 Ericsson AB<br>
+      &copy; 2010&ndash;2021 Ericsson AB<br>
       Licensed under the Apache License, Version 2.0.
     HTML
 
+    version '24' do
+      self.release = '24.0'
+    end
+
     version '23' do
       self.release = '23.2'
     end