Update GitHub Actions Runner size (#240)

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# PR Details
This PR updates the runner size to 16 cores in our current CI workflow
to reduce reruns by the development team when builds or tests fail,
which consumes more resource minutes.
## Description

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## Related GitHub Issue

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## Related Jira Key

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## Motivation and Context

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## How Has This Been Tested?

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## Types of changes

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- [ ] Defect fix (non-breaking change that fixes an issue)
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- [ ] Breaking change (fix or feature that cause existing functionality
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## Checklist:

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- [ ] I have added any new packages to the sonar-scanner.properties file
- [ ] My change requires a change to the documentation.
- [ ] I have updated the documentation accordingly.
- [ ] I have read the
[**CONTRIBUTING**](https://github.com/usdot-fhwa-stol/carma-platform/blob/develop/Contributing.md)
document.
- [ ] I have added tests to cover my changes.
- [ ] All new and existing tests passed.

.github/workflows/ci.yml

@@ -22,7 +22,8 @@ jobs:
       run:
         shell: bash
         working-directory: "/opt/carma/"
-    runs-on: ubuntu-latest
+    # Specify the runner environment
+    runs-on: ubuntu-latest-16-cores
     container:
       image: ${{ needs.determine_docker_org_and_tag.outputs.docker_organization }}/carma-base:${{ needs.determine_docker_org_and_tag.outputs.docker_image_tag }}
       env:
@@ -69,4 +70,4 @@ jobs:
       uses: usdot-fhwa-stol/actions/sonar-scanner@main
       with:
         sonar-token: ${{ secrets.SONAR_TOKEN }}
-        working-dir: "/opt/carma/src/${{ github.event.repository.name }}"
+        working-dir: "/opt/carma/src/${{ github.event.repository.name }}"