Use CGI::unescape instead of deprecated URL::decode

https://ruby-doc.org/stdlib-2.5.1/libdoc/uri/rdoc/URI/Escape.html#method-i-unescape

Signed-off-by: Mavridis Philippe <mavridisf@gmail.com>

amarok/src/scripts/score_default/score_default.rb

@@ -6,7 +6,7 @@
 #
 # License: GNU General Public License V2
 
-require 'uri'
+require 'cgi'
 
 loop do
     args = gets.chomp.split(" ")
@@ -30,7 +30,7 @@ loop do
                 newscore = ( ( prevscore * playcount ) + percentage ) / ( playcount + 1 )
             end
 
-            system( "dcop", "amarok", "player", "setScoreByPath", URI::decode( url ), newscore.to_s )
+            system( "dcop", "amarok", "player", "setScoreByPath", CGI::unescape( url ), newscore.to_s )
     end
 end