run nightly on newest python

Author: twoertwein

.github/workflows/test.yml

@@ -52,7 +52,7 @@ jobs:
     - name: Install pandas-stubs and run tests on the installed stubs
       run: poetry run poe test_dist
 
-    - if: matrix.python-version == '3.8' && matrix.os == 'ubuntu-latest'
+    - if: matrix.python-version == '3.10' && matrix.os == 'ubuntu-latest'
       name: Run pytest (against pandas nightly)
       run: |
         poetry run poe pytest --nightly