Update CI dep versions

Author: davesteele

.github/workflows/testnox.yml

@@ -16,9 +16,9 @@ jobs:
         python-version: ["3.10", "3.11", "3.12", "3.13"]
     steps:
     - name: Check out
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: ${{ matrix.python-version }}
     - name: Update apt registry