ci.yml: bump dependency version

.github/workflows/ci.yml

@@ -7,23 +7,18 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
-        with:
-          fetch-depth: 0
+      - uses: actions/checkout@v4
 
-      # Sets up lua
       - name: Install Lua
         run: |
           sudo apt install lua5.1 luarocks
           sudo luarocks install luafilesystem
           sudo luarocks install luacheck
 
-      # Sets up the environment
       - name: Set up environment
         run: |
           wget -O .luacheckrc 'https://ci.appveyor.com/api/projects/cuberite/cuberite/artifacts/.luacheckrc?job=Windows-x64&pr=false&branch=master'
 
-      # Runs the test
       - name: Run tests
         run: |
           luacheck . --codes