Fix PWM RX lua

[pkendall64]

Moving the folder elements to the end of the LUA code fixes the problem.
I think this is a workaround as I believe the root of the problem is actually in the Lua script.

[gjhaynes]

No LUA error on Matek R24-D with this pull request. Channel mapping works. Tx Module running 3.0.1.

[JyeSmith]

Tested in a mashup of current PRs.

I wasnt having issues, but this PR still look fine on a Pico PWM Rx.

[ajjjjjjjj]

I have tested previous revision again just to make sure that Serial speed or Packet Rate have any influence on that but no.
After flashing this revision error went away.

Regarding your comment on Lua:
I'm not using Lua but custom C implementation (based on Lua) and error was exactly in the same place as it was in Lua and now is gone.

[wvarty]

Tested on:

• TX16S internal
• HM EPW5

Confirmed I could reproduce the syntax error on a different branch, flashed this branch and error no longer occurs.
Good to go.

[paulkidd68]

Tested

.TX16s with BetaFPV external
.BetaFPV PWM rx

Flashed with the Maintenance branch and all working.