Update GitHub Actions to v4

Author: chcmedeiros

.github/workflows/publishLedger.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Git commit hash
         id: hash
         run: |

.github/workflows/publishZondax.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Git commit hash
         id: hash
         run: echo "hash=$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT