Revert "Bump polyfactory from 2.21.0 to 2.22.1" (#241)

Author: eddalmond1

poetry.lock

@@ -49,7 +49,7 @@ pytest-nhsd-apim = "^5.0.0"
 aiohttp = "^3.12.13"
 awscli = "^1.37.24"
 awscli-local = "^0.22.0"
-polyfactory = "^2.22.1"
+polyfactory = "^2.20.0"
 pyright = "^1.1.394"
 brunns-matchers = "^2.9.0"
 localstack = "^4.1.1"