Bump xmldom and jspdf in /WebGYM/WebGYM/gym-project

Removes [xmldom](https://github.com/xmldom/xmldom). It's no longer used after updating ancestor dependency [jspdf](https://github.com/MrRio/jsPDF). These dependencies need to be updated together.


Removes `xmldom`

Updates `jspdf` from 1.5.3 to 2.5.1
- [Release notes](https://github.com/MrRio/jsPDF/releases)
- [Changelog](https://github.com/parallax/jsPDF/blob/master/RELEASE.md)
- [Commits](parallax/jsPDF@v1.5.3...v2.5.1)

---
updated-dependencies:
- dependency-name: xmldom
  dependency-type: indirect
- dependency-name: jspdf
  dependency-type: direct:production
...

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Author: dependabot[bot]