Fix noxfile.py syntax for nox-2025.2.9 (#2240)

nox-2025.2.9 failed with:

```
ValueError: ("'reuse_venv' must be in ['no', 'yes', 'never', 'always'] (got True)", Attribute(name='reuse_venv', default=NOTHING, validator=<optional validator for <in_ validator with options ['no', 'yes', 'never', 'always']> or None>, repr=True, eq=True, eq_key=None, order=True, order_key=None, hash=None, init=True, metadata=mappingproxy({}), type="None | Literal['no', 'yes', 'never', 'always']", converter=None, kw_only=True, inherited=False, on_setattr=None, alias='reuse_venv'), ['no', 'yes', 'never', 'always'], True)
```

Author: mgorny

noxfile.py

@@ -8,7 +8,7 @@
     from nox.sessions import Session
 
 nox.options.default_venv_backend = "uv"
-nox.options.reuse_venv = True
+nox.options.reuse_venv = "yes"
 
 PYTHON_VERSIONS = ["3.8", "3.9", "3.10", "3.11", "3.12"]