CI: bump checkout action version

Author: sami-alajrami

.github/workflows/publish.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           ref: ${{ github.event.release.tag_name }}
       - name: Install deps and build

.github/workflows/test.yml

@@ -21,7 +21,7 @@ jobs:
         version: [0.1.15]
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Install deps and build
         run: npm ci && npm run build