"Warning parsing security reports": Upgrade report schema

Running Package Hunter now generates warnings in pipeline because the JSON used for the report needs to be updated:

Warning parsing security reports
Check the messages generated while parsing the following security reports, as they may prevent the results from being ingested by GitLab. Ensure the security report conforms to a supported 


[Schema] version 14.1.1 for report type dependency_scanning is deprecated. However, GitLab will still attempt to parse and ingest this report. Upgrade the security report to one of the following versions: 15.0.0, 15.0.1, 15.0.2, 15.0.4.
[Schema] version 14.1.1 for report type dependency_scanning is deprecated. However, GitLab will still attempt to parse and ingest this report. Upgrade the security report to one of the following versions: 15.0.0, 15.0.1, 15.0.2, 15.0.4.

source: https://gitlab.com/gitlab-org/gitlab/-/pipelines/760868031/security