[CI] Coverity missing flag during CMake build

[KFilipek]

Description

Checklist

• [ ] Code compiles without errors locally
• [ ] All tests pass locally
• [ ] CI workflows execute properly

• [ ] CI workflows, not executed per PR (e.g. Nightly), execute properly
• [ ] New tests added, especially if they will fail without my changes
• [ ] Added/extended example(s) to cover this functionality
• [ ] Extended the README/documentation
• [ ] All newly added source files have a license
• [ ] All newly added source files are referenced in CMake files
• [ ] Logger (with debug/info/... messages) is used

[lukaszstolarczuk]

CI is taking a hit today, again. No need for testing - we only change a workflow, which is not triggered here, anyway.