driconf: Disable dzn for bg3.exe

The app selects dzn over native drivers in some instances and dzn
doesn't handle this app (yet), so disable.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31157>

src/util/00-mesa-defaults.conf

@@ -1293,6 +1293,10 @@ TODO: document the other workarounds.
         <application name="Red Dead Redemption 2" executable="RDR2.exe">
             <option name="dzn_disable" value="true" />
         </application>
+        <!-- Similar to RDR2, but selects dzn instead of native drivers. -->
+        <application name="Baldur's Gate 3" executable="bg3.exe">
+            <option name="dzn_disable" value="true" />
+        </application>
     </device>
     <device driver="d3d12">
         <application name="Blender" executable="blender.exe">