fix: added a space line

[dorian-tsorfy]

what

I added a space line to the policy_check_results_wrapped.tmpl file so the output on GitLab will look nice.
Resolving issue #4623.

why

We have noticed intermittent issues rendering the markdown Atlantis outputs to GitLab when a policy check failure occurs ever since upgrading from v0.27.3 to v0.28.1. I suspect this could be related to #4254 and the formatting changes it made.

tests

references

#4623

[jamengual]

Thanks @dorian-tsorfy

[X-Guardian]

This PR is causing tests to fail in the main branch. Example: https://github.com/runatlantis/atlantis/actions/runs/10209313703/job/28247149152?pr=4804

--- FAIL: TestRenderProjectResults (0.01s)
    logger.go:146: 2024-08-02T03:08:09.809Z	INFO	log
    --- FAIL: TestRenderProjectResults/single_successful_policy_check_with_project_name (0.00s)
        --- FAIL: TestRenderProjectResults/single_successful_policy_check_with_project_name/single_successful_policy_check_with_project_name (0.00s)
            markdown_renderer_test.go:1192: [Ran Policy Check for project: `projectname` dir: `path` workspace: `workspace`

This file needs updating server/events/markdown_renderer_test.go.

[X-Guardian]

@dorian-tsorfy, this PR has been reverted as it was causing the Test CI to fail. Can you raise another PR with this change plus the updates needed to the server/events/markdown_renderer_test.go file. Thanks!