Update action versions (#2675)

For the CodeQL action in particular, this fixes a deprecation warning:

```
CodeQL Action v3 will be deprecated in December 2026.
Please update all occurrences of the CodeQL Action in your workflow files to v4.
For more information, see https://github.blog/changelog/2025-10-28-upcoming-deprecation-of-codeql-action-v3/
```

Author: kurtmckee

.github/workflows/code-analysis.yml

@@ -18,7 +18,7 @@ jobs:
     steps:
       # Checkout the repository to the GitHub Actions runner
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: PowerShell Module Cache
         uses: potatoqualitee/psmodulecache@v6.2.1
@@ -38,7 +38,7 @@ jobs:
 
       # Upload the SARIF file generated in the previous step
       - name: Upload SARIF results file
-        uses: github/codeql-action/upload-sarif@v3
+        uses: github/codeql-action/upload-sarif@v4
         with:
           sarif_file: results.sarif
   # codeql: