fix: usage of a deprecated Node.js version in CI

Author: hamirmahal

.github/workflows/build_nix.yml

@@ -10,7 +10,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: cachix/install-nix-action@v20
       - name: Building package
         run: nix-build . -A defaultPackage.x86_64-linux

.github/workflows/publish.yml

@@ -18,7 +18,7 @@ jobs:
       contents: read
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Build image
         run: docker build . --file Dockerfile --tag $IMAGE_NAME --label "runnumber=${GITHUB_RUN_ID}"