doc: link the parser at its new repository

chore(deps): bump github.com/italia/publiccode-parser-go/v5

Bumps [github.com/italia/publiccode-parser-go/v5](https://github.com/italia/publiccode-parser-go) from 5.3.1 to 5.4.3.
- [Release notes](https://github.com/italia/publiccode-parser-go/releases)
- [Changelog](https://github.com/italia/publiccode-parser-go/blob/main/CHANGELOG.md)
- [Commits](italia/publiccode-parser-go@v5.3.1...v5.4.3)

---
updated-dependencies:
- dependency-name: github.com/italia/publiccode-parser-go/v5
  dependency-version: 5.4.3
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

chore(deps): bump github.com/italia/publiccode-parser-go/v5 (#54)

Bumps [github.com/italia/publiccode-parser-go/v5](https://github.com/italia/publiccode-parser-go) from 5.2.3 to 5.3.1.
- [Release notes](https://github.com/italia/publiccode-parser-go/releases)
- [Changelog](https://github.com/italia/publiccode-parser-go/blob/main/CHANGELOG.md)
- [Commits](italia/publiccode-parser-go@v5.2.3...v5.3.1)

---
updated-dependencies:
- dependency-name: github.com/italia/publiccode-parser-go/v5
  dependency-version: 5.3.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

feat: add support for POST (#46)

Add undocumented POST to the validate endpoint only as fallback for
compatibility.

fix: add QUERY to CORS allowed methods

feat: add CORS configuration (#44)

feat: add normalized publiccode.yml to validation response (#43)

Reply with a normalized canonical equivalent publiccode.yml when
validation succeeds so clients don't need to deal with deprecated
fields, aliases or renames on their side.

Fix #42.

test: run tests in CI

refactor: fix linting issue

chore(ci): re-add GITHUB_TOKEN for goreleaser