ALSA: hda/realtek - Add model description for Chrome headset button quirk

Forgot to update the document.

Fixes: e854747d ("ALSA: hda/realtek - Enable headset button support for new codec")
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Documentation/sound/hd-audio/models.rst

@@ -258,6 +258,8 @@ alc255-dell-headset
     Dell Precision 3630 fixups
 alc295-hp-x360
     HP Spectre X360 fixups
+alc-sense-combo
+    Headset button support for Chrome platform
 
 ALC66x/67x/892
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