Update GNU Make documentation (4.4)

lib/docs/scrapers/gnu_make.rb

@@ -4,7 +4,7 @@ module Docs
     self.name = 'GNU Make'
     self.type = 'gnu_make'
     self.slug = 'gnu_make'
-    self.release = '4.3'
+    self.release = '4.4'
     self.base_url= 'https://www.gnu.org/software/make/manual/html_node/'
     self.root_path = 'index.html'
     self.links = {
@@ -21,7 +21,7 @@ module Docs
     ]
 
     options[:attribution]= <<-HTML
-      Copyright © 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 Free Software Foundation, Inc. <br>
+      Copyright © 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022 Free Software Foundation, Inc. <br>
       Licensed under the GNU Free Documentation License.
     HTML