adjust kubernetes version to 1.31.4

Signed-off-by: helenxie-bit <[email protected]>

Author: helenxie-bit

.github/workflows/e2e-test-train-api.yaml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        kubernetes-version: ["v1.30.6"]
+        kubernetes-version: ["v1.31.4"]
         python-version: ["3.9", "3.10", "3.11"]
     steps:
       - name: Checkout