Change speed 1000000 to 100000

[minolta]

Thank you for creating a pull request to contribute to Adafruit's GitHub code! Before you open the request please review the following guidelines and tips to help it be more easily integrated:

• Describe the scope of your change--i.e. what the change does and what parts of the code were modified. This will help us understand any risks of integrating the code.

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After reviewing the guidelines above you can delete this text from the pull request.

[caternuson]

Closing. Unsure if this is needed. ESP32 with SPI worked in recent testing.