Update GitHub actions

Author: fdw

.github/workflows/checks.yaml

@@ -12,10 +12,10 @@ jobs:
       matrix:
         python-version: [ "3.9", "3.10", "3.11", "3.12", "3.13" ]
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
 
     - name: Set up Python and uv
-      uses: astral-sh/setup-uv@v5
+      uses: astral-sh/setup-uv@v8.1.0
       with:
         python-version: ${{ matrix.python-version }}
         enable-cache: true

.github/workflows/release.yaml

@@ -15,9 +15,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Set up Python and uv
-        uses: astral-sh/setup-uv@v5
+        uses: astral-sh/setup-uv@v8.1.0
         with:
           python-version: 3.13
           enable-cache: true