CI: use checkout@v4

Signed-off-by: Akihiro Suda <[email protected]>

Author: AkihiroSuda

.github/workflows/release.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: macos-11
     timeout-minutes: 20
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           # https://github.com/reproducible-containers/repro-get/issues/3
           fetch-depth: 0

.github/workflows/test.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ${{ matrix.platform }}
     timeout-minutes: 40
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 1
       - name: Show host info