Merge pull request #1466 from haohangyan/actions_cache

Update actions/cache to v4

Author: bgyori

.github/workflows/tests.yml

@@ -9,8 +9,8 @@ jobs:
       matrix:
         python-version: ["3.8", "3.12"]
     steps:
-    - uses: actions/checkout@v2
-    - uses: actions/cache@v2
+    - uses: actions/checkout@v4
+    - uses: actions/cache@v4
       with:
         path: ~/.cache/pip
         key: ${{ runner.os }}-pip-${{ hashFiles('**/setup.py') }}