.github/workflows: Update actions

Author: qzed

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout code
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Install rust
       run: |
@@ -38,8 +38,7 @@ jobs:
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v3
-
+      uses: actions/checkout@v4
     - name: Install rust
       run: rustup update ${{ matrix.toolchain }} && rustup default ${{ matrix.toolchain }}