chore: updates system test runtime to 3.12

Co-authored-by: Chalmer Lowe <chalmerlowe@google.com>

Author: chalmerlowe

packages/db-dtypes/CONTRIBUTING.rst

@@ -143,12 +143,12 @@ Running System Tests
    $ nox -s system
 
    # Run a single system test
-   $ nox -s system-3.10 -- -k <name of test>
+   $ nox -s system-3.12 -- -k <name of test>
 
 
   .. note::
 
-      System tests are only configured to run under Python 3.10.
+      System tests are only configured to run under Python 3.12.
 
   This alone will not run the tests. You'll need to change some local
   auth settings and change some configuration in your project to

packages/db-dtypes/noxfile.py

@@ -57,7 +57,7 @@
 UNIT_TEST_EXTRAS: List[str] = []
 UNIT_TEST_EXTRAS_BY_PYTHON: Dict[str, List[str]] = {}
 
-SYSTEM_TEST_PYTHON_VERSIONS: List[str] = ["3.10"]
+SYSTEM_TEST_PYTHON_VERSIONS: List[str] = ["3.12"]
 SYSTEM_TEST_STANDARD_DEPENDENCIES: List[str] = [
     "mock",
     "pytest",