chore: fix checkpoint to properly publish uds-core (#1044)

## Description

Fixes checkpoint to properly publish uds-core

## Related Issue

Fixes #N/A

## Type of change

- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [X] Other (security config, docs update, etc)

## Checklist before merging

- [X] Test, docs, adr added or updated as needed
- [X] [Contributor
Guide](https://github.com/defenseunicorns/uds-template-capability/blob/main/CONTRIBUTING.md)
followed

.github/workflows/checkpoint.yaml

@@ -62,7 +62,7 @@ jobs:
         uses: ./.github/actions/debug-output
 
       - name: Publish Checkpoint Package
-        if: ${{ github.event_name == 'workflow_call' }}
+        if: ${{ github.event_name != 'pull_request' }}
         run: uds run -f tasks/publish.yaml checkpoint-package --no-progress
 
       - name: Save logs