Merge pull request #108 from mailersend/renovate/actions-checkout-5.x

chore(deps): update actions/checkout action to v5

Author: robgordon89

.github/workflows/publish.yaml

@@ -7,7 +7,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Set up Apache Maven Central
         uses: actions/setup-java@v4