CI: Fix failures of analyze workflow runs due to GitHub policy change

GitHub introduced a policy change on 2024-05-06 which deprecated
support for SARIF files that contain multiple runs for the same tool.

.github/workflows/analyze-project.yaml

@@ -124,7 +124,7 @@ jobs:
 
           pushd ${analytics_root}
 
-          npx @microsoft/sarif-multitool merge *.sarif
+          npx @microsoft/sarif-multitool merge --merge-runs *.sarif
 
           popd