chore(python): update GitHub Actions to Node 24-compatible versions

Author: thaaddeus

.github/workflows/ci.yaml

@@ -15,10 +15,10 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Use Python 3.9
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: "3.9"
 

.github/workflows/publish.yaml

@@ -14,12 +14,12 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           ref: ${{ github.event.release.target_commitish }}
 
       - name: Use Python 3.9
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: "3.9"