chore(deps): update actions/checkout action to v4 (#27)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/main.yml

@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Use Node ${{ matrix.node }}
         uses: actions/setup-node@v2