[ploopyco/trackball_thumb] Update readme.md with correct flashing instructions (#26287)

Flashing is currently set to the middle click, not button 4 (per https://github.com/qmk/qmk_firmware/blob/master/keyboards/ploopyco/trackball_thumb/info.json )
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Benoit Brummer 2026-08-08 12:18:55 +02:00 • committed by GitHub
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@ -10,7 +10,7 @@ Make example for this keyboard (after setting up your build environment):
make ploopyco/trackball_thumb/rev1_001:default:flash
To jump to the bootloader, hold down "Button 4" (button closest to the USB port).
To jump to the bootloader, hold down the middle click while plugging in the trackball.
See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).