ci: use latest version

Author: soumyaDghosh

.github/workflows/build.yml

@@ -11,7 +11,7 @@ jobs:
     name: "Vala Lint"
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: elementary/actions/vala-lint@main
       with:
         dir: .