chore(templates/angular): bump @sigstore/core in /templates/angular

Bumps [@sigstore/core](https://github.com/sigstore/sigstore-js) from 3.2.0 to 3.2.1.
- [Release notes](https://github.com/sigstore/sigstore-js/releases)
- [Commits](https://github.com/sigstore/sigstore-js/compare/@sigstore/core@3.2.0...@sigstore/core@3.2.1)

---
updated-dependencies:
- dependency-name: "@sigstore/core"
  dependency-version: 3.2.1
  dependency-type: indirect
...

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Author: dependabot[bot]