Update via Configurator installe maintenance version

I updated my Radiomaster GX 12 and a SpeedyBee nano receiver and both show "4.x maint. as version string.

## Expected Behavior

I expected it to be "4.0.0".

## Current Behavior

I got "4.x maint.".

## Steps to Reproduce

1. flash 4.0.0 firmware with 1.17.11 configurator
2.check the version string with the Lua script

## Possible Solution (Not obligatory)

Workaorund: use the web flasher ... I tried using the web flasher and got the expected version

## Context

## Your Environment

- Operating System and version: Mac OS X 26.2 / ExpressLRS Configurator 1.7.11
- TX hardware: Radiomaster GX 12
- RX SpeedyBee nano