Bump actions/checkout from 4 to 6 (#39)

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Install jq tool
         run: |
           sudo apt-get update

.github/workflows/npmpublish.yml

@@ -11,7 +11,7 @@ jobs:
   publish-npm:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Install jq tool
         run: |
           sudo apt-get update