build(deps): Bump jspdf from 4.1.0 to 4.2.0

Bumps [jspdf](https://github.com/parallax/jsPDF) from 4.1.0 to 4.2.0.
- [Release notes](https://github.com/parallax/jsPDF/releases)
- [Changelog](https://github.com/parallax/jsPDF/blob/master/RELEASE.md)
- [Commits](parallax/jsPDF@v4.1.0...v4.2.0)

---
updated-dependencies:
- dependency-name: jspdf
  dependency-version: 4.2.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -34,7 +34,7 @@
     "@sindresorhus/slugify": "^3.0.0",
     "@x-govuk/govuk-eleventy-plugin": "^8.3.0",
     "govuk-frontend": "5.14.0",
-    "jspdf": "^4.1.0",
+    "jspdf": "^4.2.0",
     "markdown-it": "^14.1.1"
   },
   "devDependencies": {