Bump adafruit-circuitpython-dht from 3.5.4 to 3.5.6
Bumps [adafruit-circuitpython-dht](https://github.com/adafruit/Adafruit_CircuitPython_DHT) from 3.5.4 to 3.5.6.
- [Release notes](https://github.com/adafruit/Adafruit_CircuitPython_DHT/releases)
- [Commits](https://github.com/adafruit/Adafruit_CircuitPython_DHT/compare/3.5.4...3.5.6)
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