chore(deps): update actions/checkout action to v4 (#37)

Author: renovate[bot]

.github/workflows/pack.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0 # avoid shallow clone