fix comment and nox

Author: chelsea-lin

.github/workflows/lint.yml

@@ -12,7 +12,7 @@ jobs:
     - name: Setup Python
       uses: actions/setup-python@v5
       with:
-        python-version: "3.9"
+        python-version: "3.8"
     - name: Install nox
       run: |
         python -m pip install --upgrade setuptools pip wheel

CONTRIBUTING.rst

@@ -143,12 +143,12 @@ Running System Tests
    $ nox -s system
 
    # Run a single system test
-   $ nox -s system-3.8 -- -k <name of test>
+   $ nox -s system-3.9 -- -k <name of test>
 
 
   .. note::
 
-      System tests are only configured to run under Python 3.8.
+      System tests are only configured to run under Python 3.9.
       For expediency, we do not run them in older versions of Python 3.
 
   This alone will not run the tests. You'll need to change some local

noxfile.py

@@ -80,7 +80,7 @@
 nox.options.error_on_missing_interpreters = True
 
 
-@nox.session(python=DEFAULT_PYTHON_VERSION)
+@nox.session(python=3.8)
 def lint(session):
     """Run linters.
 

testing/constraints-3.9.txt

@@ -1,3 +1,3 @@
 # Make sure we test with pandas 1.5.3. The Python version isn't that relevant.
 pandas==1.5.3
-numpy==1.24.0
+numpy==1.20.3