Use python 3.7.10 for doxygen and link verifier. (#1548)
Use python 3.7.10 for doxygen and link verifier. (#1548)

Python version 3.7.10 has a fix for a security vulnerability.
aws/aws-iot-device-sdk-embedded-C,aws/aws-iot-device-sdk-embedded-C,aws/aws-iot-device-sdk-embedded-C