Add missing dot from CI filename on license_scanning_spec

What does this MR do and why?

As per #428887 (comment 1612553471) , this spec was failing after the commit fabrication was migrated to a factory create.

This was because the .gitlab-ci.yml was missing the first dot and wasn't being treated as CI, no pipeline was then ran.

This MR simply re-adds the .

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Before	After

How to set up and validate locally

Run against Staging Canary, spec should pass:

QA_COOKIES='gitlab_canary=true' GITLAB_QA_USER_AGENT =<USER_AGENT> GITLAB_ADMIN_USERNAME=<ADMIN_USERNAME> GITLAB_ADMIN_PASSWORD="<ADMIN_PASSWORD>" GITLAB_USERNAME=<USERNAME> GITLAB_QA_ACCESS_TOKEN="<ACCESS_TOKEN>" GITLAB_PASSWORD="<GITLAB_PASSWORD>"  QA_DEBUG=true WEBDRIVER_HEADLESS=true bundle exec bin/qa Test::Instance::All https://staging.gitlab.com qa/specs/features/ee/browser_ui/13_secure/license_scanning_spec.rb

MR acceptance checklist

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