Upgrade GitHub Actions for Node 24 compatibility

Author: salmanmkc

.github/workflows/ci.yml

@@ -29,8 +29,8 @@ jobs:
         jax-version: ["newest"]
 
     steps:
-      - uses: actions/checkout@v5
-      - uses: actions/setup-python@v5.3.0
+      - uses: actions/checkout@v6
+      - uses: actions/setup-python@v6
         with:
             python-version: "${{ matrix.python-version }}"
       - name: Run CI tests

.github/workflows/pypi-publish.yml

@@ -10,9 +10,9 @@ jobs:
     permissions:
       id-token: write
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v6
       with:
         python-version: '3.x'
     - name: Install dependencies