[PRISM] Fix version spec to account for prism

spec/ruby/command_line/dash_v_spec.rb

@@ -6,7 +6,7 @@ describe "The -v command line option" do
 
   describe "when used alone" do
     it "prints version and ends" do
-      ruby_exe(nil, args: '-v').should include(RUBY_DESCRIPTION)
+      ruby_exe(nil, args: '-v').sub("+PRISM ", "").should include(RUBY_DESCRIPTION)
     end unless (defined?(RubyVM::YJIT) && RubyVM::YJIT.enabled?) ||
                (defined?(RubyVM::RJIT) && RubyVM::RJIT.enabled?) ||
                (ENV['RUBY_MN_THREADS'] == '1')