app-emulation/wine-proton: update live?

wine-mono was at 9.3.0 (still seeing the old value in a old checkout)
but seems the commit that made that change is gone, was the
experimental_9.0 branch force pushed?

Odds are it's a mistake and will have to change it back, but adjust
anyway in the interim.

Signed-off-by: Ionen Wolkens <ionen@gentoo.org>

app-emulation/wine-proton/wine-proton-9.0.9999.ebuild

@@ -9,7 +9,7 @@ inherit autotools flag-o-matic multilib multilib-build prefix
 inherit python-any-r1 readme.gentoo-r1 toolchain-funcs wrapper
 
 WINE_GECKO=2.47.4
-WINE_MONO=9.3.0
+WINE_MONO=9.1.0
 WINE_PV=$(ver_rs 2 -)
 
 if [[ ${PV} == *9999 ]]; then