ci: Update actions/checkout action to v4

Author: taiki-e

.github/workflows/ci.yml

@@ -56,7 +56,7 @@ jobs:
     runs-on: ${{ matrix.os || 'ubuntu-20.04' }}
     timeout-minutes: 60
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           persist-credentials: false
       - name: Install Rust
@@ -92,7 +92,7 @@ jobs:
     runs-on: ${{ matrix.os || 'ubuntu-20.04' }}
     timeout-minutes: 60
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           persist-credentials: false
       - name: Install Rust
@@ -127,7 +127,7 @@ jobs:
     runs-on: ubuntu-20.04
     timeout-minutes: 60
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           persist-credentials: false
       - name: Install Rust
@@ -141,7 +141,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 60
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           persist-credentials: false
       - name: Install Rust

.github/workflows/release.yml

@@ -29,7 +29,7 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           persist-credentials: false
       - name: Install Rust
@@ -74,7 +74,7 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           persist-credentials: false
       - name: Install Rust