Fix missed version change in DEVELOPMENT.md

Author: cooperlees

DEVELOPMENT.md

@@ -80,7 +80,7 @@ You can also use [tox](https://tox.wiki/en/latest/index.html) to test with multi
 ```console
 /path/to/venv/bin/tox
 ```
-will by default run all tests on python versions 3.10 through 3.13. If you only want to test a specific version you can specify the environment with `-e`
+will by default run all tests on python versions 3.10 through 3.14. If you only want to test a specific version you can specify the environment with `-e`
 
 ```console
 /path/to/venv/bin/tox -e py313