Upgrade actions/checkout to v6

Updated actions/checkout to version v6 in Codacy workflow.

Author: cbaker6

.github/workflows/codacy.yml

@@ -42,7 +42,7 @@ jobs:
     steps:
       # Checkout the repository to the GitHub Actions runner
       - name: Checkout code
-        uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd
+        uses: actions/checkout@v6
 
       # Execute Codacy Analysis CLI and generate a SARIF output with the security issues identified during the analysis
       - name: Run Codacy Analysis CLI