Remember: (Chat) GenAI is just a text-generator: it doesn't know what you asked, or what text it output. Sometimes that text will be accurate, sometimes it won't. It's not a reliable source.
Now, if I understand you correctly, the audio for the spell in question is too loud? (I haven't played Warlock, so I don't know it myself.) If so, then in principle the idea of lowering the volume of the audio is--*ahem*--sound.
As to the file-name... well, why not just play the sound an find out...? If it's the right one, reduce its volume and continue. If it's not the right one, keep looking for other candidate sound-files.