Highlight specifying API version in README

Author: honno

README.md

@@ -33,11 +33,23 @@ You need to specify the array library to test. It can be specified via the
 `ARRAY_API_TESTS_MODULE` environment variable, e.g.
 
 ```bash
-$ export ARRAY_API_TESTS_MODULE=numpy.array_api
+$ export ARRAY_API_TESTS_MODULE=array_api_strict
 ```
 
 Alternately, import/define the `xp` variable in `array_api_tests/__init__.py`.
 
+### Specifying the API version
+
+You can specify the API version to use when testing via the
+`ARRAY_API_TESTS_VERSION` environment variable, e.g.
+
+```bash
+$ export ARRAY_API_TESTS_VERSION="2023.12"
+```
+
+Currently this defaults to the array module's `__array_api_version__` value, and
+if that attribute doesn't exist then we fallback to `"2021.12"`.
+
 ### Run the suite
 
 Simply run `pytest` against the `array_api_tests/` folder to run the full suite.
@@ -154,13 +166,6 @@ library to fail.
 
 ### Configuration
 
-#### API version
-
-You can specify the API version to use when testing via the
-`ARRAY_API_TESTS_VERSION` environment variable. Currently this defaults to the
-array module's `__array_api_version__` value, and if that attribute doesn't
-exist then we fallback to `"2021.12"`.
-
 #### Data-dependent shapes
 
 Use the `--disable-data-dependent-shapes` flag to skip testing functions which have