Adjust wording for pipeline's license tab

What does this MR do and why?

Adjust wording for pipeline's license tab. In the context of the pipeline view, there is no possible comparison between the source and the target branch, so the wording should not suggest that. This is only relevant on the MR widget, which probably was sharing this code before we migrated it to the V2 widget framework.

Ref License compliance detects licenses for the sou... (#480077 - closed)

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

Before	After

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

Example project: https://gitlab.com/gitlab-org/secure/tests/olivier/mr-license-widget-comparison

1. Create a new project
2. Add files from https://github.com/CycloneDX/cyclonedx-php-composer/tree/master/demo/laravel-7.12.0/project
3. Create a .gitlab-ci.yml file with:

include:
  - template: Jobs/Dependency-Scanning.gitlab-ci.yml

4. Check the Dependency List for stored dependencies with their licences in the DB.
5. Create a new merge request with any change other than the dependency files from 2.
6. Check the pipeline view -> Licences