Update audio file column names

test/metadata.csv

@@ -1,4 +1,4 @@
-speaker,gender,prompt_duration,prompt_speaking_rate,prompt_text,prompt_path,duration,speaking_rate,text,path
+speaker,gender,prompt_duration,prompt_speaking_rate,prompt_text,prompt_audio_file_name,duration,speaking_rate,text,audio_file_name
 P5038,female,4.66,3.43,"You got to catch people, catch them off, focus back in, hone back in.",prompt-audio/0003/0022/V03_S1825_I00000006_P5038_s33.75_e38.41.flac,10.47,4.39,"with juicing and stuff like that in the mornings, and then, you know, probably, like, breakfast, like, little bars and stuff during the, you know, lunchtime, hold me over, and then have, like, one set dinner.",audio/0003/0011/V03_S2028_I00000237_P5038_s107.17_e117.64.flac
 P5054,male,4.32,3.7,"A lot of us men who decide, no, my work should speak for itself.",prompt-audio/0003/0012/V03_S1930_I00000112_P5054_s152.4_e156.72.flac,10.87,3.13,"all the time when you're back around these guys in a large group, it kind of brings you back your swag, your energy that you need, you know what I mean?",audio/0003/0016/V03_S1930_I00000120_P5054_s53.31_e64.17.flac
 P5679,female,4.68,3.2,So I like the liberating aspect in that experience.,prompt-audio/0003/0038/V03_S2084_I00000236_P5679_s63.56_e68.24.flac,11.38,3.25,And now I think what I've gained is perspective and even some tools that allow me to step back and kind of attach with love and really puzzle through.,audio/0003/0025/V03_S2084_I00000238_P5679_s30.68_e42.06.flac