Fix Pi 5 NeoPixel package version - use pre-release 1.0.0rc1

The Adafruit-Blinka-Raspberry-Pi5-Neopixel package only has release
candidate versions available (1.0.0rc2 is latest). Using >=1.0.0
won't match pre-releases by default.

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

requirements.txt

@@ -21,4 +21,4 @@ rpi-lgpio>=0.4  # Provides RPi.GPIO interface, works on Pi 4 and Pi 5
 rpi-ws281x>=5.0.0  # Low-level NeoPixel/WS281x driver (Pi 4)
 adafruit-circuitpython-neopixel>=6.3.0  # Standard NeoPixel library (Pi 4)
 Adafruit-Blinka>=8.0.0  # CircuitPython compatibility layer
-Adafruit-Blinka-Raspberry-Pi5-Neopixel>=1.0.0  # Pi 5 PIO-based NeoPixel driver
+Adafruit-Blinka-Raspberry-Pi5-Neopixel>=1.0.0rc1  # Pi 5 PIO-based NeoPixel driver (pre-release)