lua-howto: Wide switch mode is 64-position only

The Switch Mode summary still said Wide is "7x 64 or 128-position".
The 128-position case was removed in 4.0 along with the telemetry ratio
branch in the Wide encoder, so only 64-position remains.

The Hybrid half of the sentence is correct and is unchanged.

Author: MUSTARDTIGERFPV

docs/quick-start/transmitters/lua-howto.md

@@ -189,7 +189,7 @@ These are shown as `Packet Rate` and `Telem Ratio` in the Lua script, which allo
 
 ### Switch Mode
 
-The Switch Mode setting controls how channels AUX1-AUX8 are sent to the receiver (the 4 main channels are always 10-bit). The options are `Hybrid & Wide`. **Hybrid** mode is 6x 2, 3 or 6-position + 1x 16-position, and **Wide** is 7x 64 or 128-position. For detail about the differences, see the [Switch Configs](../../software/switch-config.md) documentation.
+The Switch Mode setting controls how channels AUX1-AUX8 are sent to the receiver (the 4 main channels are always 10-bit). The options are `Hybrid & Wide`. **Hybrid** mode is 6x 2, 3 or 6-position + 1x 16-position, and **Wide** is 7x 64-position. For detail about the differences, see the [Switch Configs](../../software/switch-config.md) documentation.
 
 In full resolution modes, the Switch Mode parameter selects the number of channels to be used. [Full Resolution Switch Modes](../../software/switch-config.md#full-resolution-switch-configuration-modes)