Add instructions to address pydantic v2 incompatibility (#713) #1022

Job	Run time
Python 3.8 tests	2m 59s
Python 3.9 tests	5m 4s
Python 3.10 tests	5m 4s
Python 3.11 tests	3m 4s
lint / build (3.8)	5m 8s
lint / build (3.11)	4m 58s
pydantic-compatibility / Pydantic v1/v2 compatibility - Python 3.8	2m 57s
pydantic-compatibility / Pydantic v1/v2 compatibility - Python 3.9	2m 57s
pydantic-compatibility / Pydantic v1/v2 compatibility - Python 3.10	3m 1s
pydantic-compatibility / Pydantic v1/v2 compatibility - Python 3.11	2m 52s
	38m 4s

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