Description of problem:
Package sdformat fails to build from source in Fedora Rawhide.

Version-Release number of selected component (if applicable):
6.0.0-12.fc37

Steps to Reproduce:
koji build --scratch f38 sdformat-6.0.0-12.fc37.src.rpm

Additional info:
This package is tracked by Koschei. See:
https://koschei.fedoraproject.org/package/sdformat


cd /builddir/build/BUILD/sdformat-6.0.0/redhat-linux-build/sdf/1.5 && /usr/bin/ruby /builddir/build/BUILD/sdformat-6.0.0/tools/xmlschema.rb -s /builddir/build/BUILD/sdformat-6.0.0/sdf/1.5 -i /builddir/build/BUILD/sdformat-6.0.0/sdf/1.5/audio_sink.sdf -o /builddir/build/BUILD/sdformat-6.0.0/redhat-linux-build/sdf/1.5
/builddir/build/BUILD/sdformat-6.0.0/tools/xmlschema.rb:268:in `<main>': undefined method `exists?' for File:Class (NoMethodError)
elsif !File.exists?(infile)
           ^^^^^^^^
Did you mean?  exist?
gmake[2]: *** [sdf/1.5/CMakeFiles/schema1_5.dir/build.make:129: sdf/1.5/actor.xsd] Error 1


The File.exists? method is removed in Ruby 3.2 (https://docs.ruby-lang.org/en/3.2/NEWS_md.html#label-Removed+methods, https://bugs.ruby-lang.org/issues/17391).


Please see upstream PR https://github.com/gazebosim/sdformat/pull/1216.