Update Frontend SBOM to Support CycloneDX 1.5 or 1.6

### Current Behavior

The latest release of DT Frontend is v4.11.3 and the BOM is published as a [release asset](https://github.com/DependencyTrack/frontend/releases/download/4.11.3/bom.json) and also available from DT itself via `/.well-known/sbom`

The BOM is generated using CycloneDX Webpack Plugin v2.0.2 which only supports CDX 1.3.

### Proposed Behavior

* Upgrade plugin from 2.0.2 to 3.12.0 (or later)
* Ensure that specVersion = 1.5 or 1.6. The latest version of the webpack-plugin does support CDX 1.6

### Checklist

- [X] I have read and understand the [contributing guidelines](https://github.com/DependencyTrack/dependency-track/blob/master/CONTRIBUTING.md#filing-issues)
- [X] I have checked the [existing issues](https://github.com/DependencyTrack/frontend/issues) for whether this enhancement was already requested