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

Author: renovate[bot]

.github/workflows/ossar-analysis.yml

@@ -32,7 +32,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
       # Run open source static analysis tools
     - name: Run OSSAR