Update README-DEV.md

Co-authored-by: jo-basevi <[email protected]>

README-DEV.md

@@ -36,7 +36,8 @@ The configuration properties needed to run the tests are:
 | ---- | ---- | ----------- | -------- |
 | markers | `string` | Markers used for the pytest checks, in the python format | `checksum` |
 | model-config-tests-version | `string` | The version of the model-config-tests | `0.0.1` |
-| payu-version | `string` | The Payu version used to create test virtual environment | `1.1.4` |
+| python-version | `string` | The python version used to create test virtual environment on Github hosted tests | `3.11.0` |
+| payu-version | `string` | The Payu version used to run the model | `1.1.4` |
 
 As most of the tests use the same test and python versions, and similar markers, there are two levels of defaults. There's a default at test type level which is useful for defining test markers - this selects certain pytests to run in `model-config-tests`. There is an outer global default, which is used if a property is not defined for a given branch/tag, and it is not defined for the test default. The `parse-ci-config` action applies the fall-back default logic. For more information on using this action see [`ACCESS-NRI/model-config-tests`](https://github.com/ACCESS-NRI/model-config-tests/).