Aubio - fix shell punctuation for Windows compatibility

Windows shell commands containing spaces appear to require "" surrounding the full path rather than ''. macOS appears to support both, so use "".

Author: samaaron

app/server/ruby/lib/sonicpi/samplebuffer.rb

@@ -102,7 +102,7 @@ def onset_data
           # [:minioi_ms]       12.0 (ms)
 
           begin
-            aubio_onsets_command = "'#{aubio_onset_path}' '#{@path}'"
+            aubio_onsets_command = "\"#{aubio_onset_path}\" \"#{@path}\""
             onsets_str = `#{aubio_onsets_command}`
             onsets = onsets_str.split.map(&:to_f)
           rescue Exception => e