Fix examples/sax_ractor.rb error

[Watson1978]

This patch will fix following error:

$ ruby sax_ractor.rb /usr/share/mime/packages/freedesktop.org.xml image/jpeg font/ttf application/xhtml+xml image/x-pic
Parallel Ractors
#<Thread:0x00007fed255b7858 run> terminated with exception (report_on_exception is true):
#<Thread:0x00007fed2567fce0 run> terminated with exception (report_on_exception is true):
#<Thread:0x00007fed2567fa38 run> terminated with exception (report_on_exception is true):
#<Thread:0x00007fed2567f768 run> terminated with exception (report_on_exception is true):
#<Enumerator: ...>
/home/watson/.rbenv/versions/3.4.7/lib/ruby/gems/3.4.0/gems/ox-2.14.23/lib/ox/sax.rb:58:in 'initialize': wrong number of arguments (given 2, expected 0) (ArgumentError)
        from sax_ractor.rb:38:in 'Saxtor#initialize'
        from sax_ractor.rb:166:in 'Class#new'
        from sax_ractor.rb:166:in 'block (2 levels) in <main>'
/home/watson/.rbenv/versions/3.4.7/lib/ruby/gems/3.4.0/gems/ox-2.14.23/lib/ox/sax.rb:58:in 'initialize': ArgumentError
        from sax_ractor.rb:38:in 'Saxtor#initialize'
        from sax_ractor.rb:166:in 'Class#new'
        from sax_ractor.rb:166:in 'block (2 levels) in <main>'
/home/watson/.rbenv/versions/3.4.7/lib/ruby/gems/3.4.0/gems/ox-2.14.23/lib/ox/sax.rb:58:in 'initialize': ArgumentError
        from sax_ractor.rb:38:in 'Saxtor#initialize'
/home/watson/.rbenv/versions/3.4.7/lib/ruby/gems/3.4.0/gems/ox-2.14.23/lib/ox/sax.rb:58:in 'initialize' from sax_ractor.rb:166:in 'Class#new'
        from sax_ractor.rb:166:in 'block (2 levels) in <main>'
: ArgumentError
        from sax_ractor.rb:38:in 'Saxtor#initialize'
        from sax_ractor.rb:166:in 'Class#new'
        from sax_ractor.rb:166:in 'block (2 levels) in <main>'
sax_ractor.rb:182:in 'block in <main>': undefined method 'name' for an instance of Integer (NoMethodError)

  "#{_1.name} gave us #{_2 || 'nothing'}"
       ^^^^^
        from sax_ractor.rb:181:in 'Range#each'
        from sax_ractor.rb:181:in 'Enumerable#map'
        from sax_ractor.rb:181:in 'Enumerator#each'
        from sax_ractor.rb:181:in 'Enumerable#map'
        from sax_ractor.rb:181:in '<main>'

Applied this patch:

$ ruby sax_ractor.rb /usr/share/mime/packages/freedesktop.org.xml image/jpeg font/ttf application/xhtml+xml image/x-pic
Parallel Ractors
["Heifer 1 gave us JPEG-beeld (image/jpeg) [.jpg,.jpeg,.jpe,.jfif]",
 "Steer 1 gave us TrueType-skriftipe (font/ttf) [.ttf]",
 "Bull 1 gave us XHTML-bladsy (application/xhtml+xml) [.xhtml,.xht,.html,.htm]",
 "Steer 2 gave us nothing"]

Serial Ractor
"ONLY ONE OX gave us [#<CYO JPEG-beeld (image/jpeg) [.jpg,.jpeg,.jpe,.jfif]>, #<CYO TrueType-skriftipe (font/ttf) [.ttf]>, #<CYO XHTML-bladsy (application/xhtml+xml) [.xhtml,.xht,.html,.htm]>, #<CYO XHTML-bladsy (application/xhtml+xml) [.xhtml,.xht,.html,.htm]>]"