chore(deps): update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/jfrog-publish.yml

@@ -10,7 +10,7 @@ jobs:
       contents: read
       packages: write 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Java for publishing to Mifos Artifactory
         uses: actions/setup-java@v5
         with: