update GitHub Actions workflow: upgrade actions and Python version to 3.14

Author: rongxin-liu

.github/workflows/main.yml

@@ -3,10 +3,10 @@ jobs:
   test-and-deploy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
+      - uses: actions/checkout@v6
+      - uses: actions/setup-python@v6
         with:
-          python-version: "3.13"
+          python-version: "3.14"
 
       - name: Run tests
         run: |
@@ -33,7 +33,7 @@ jobs:
 
       - name: Create Release
         if: ${{ github.ref == 'refs/heads/main' }}
-        uses: actions/github-script@v7
+        uses: actions/github-script@v8
         with:
           github-token: ${{ github.token }}
           script: |