ci: use current checkout action

Author: aaronlab

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6.0.2
 
       - name: Set up Python
         uses: actions/setup-python@v6
@@ -35,7 +35,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6.0.2
 
       - name: Set up Python
         uses: actions/setup-python@v6
@@ -47,4 +47,3 @@ jobs:
 
       - name: Build wheel and sdist
         run: uv build
-