Bump signpath/github-action-submit-signing-request from 1.3 to 2.0

Bumps [signpath/github-action-submit-signing-request](https://github.com/signpath/github-action-submit-signing-request) from 1.3 to 2.0.
- [Release notes](https://github.com/signpath/github-action-submit-signing-request/releases)
- [Commits](https://github.com/signpath/github-action-submit-signing-request/compare/v1.3...v2.0)

---
updated-dependencies:
- dependency-name: signpath/github-action-submit-signing-request
  dependency-version: '2.0'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/package-windows.yml

@@ -58,7 +58,7 @@ jobs:
           name: windows-build-${{ matrix.entry }}
           path: dist/*.exe
       - id: optional_step_id
-        uses: signpath/github-action-submit-signing-request@v1.3
+        uses: signpath/github-action-submit-signing-request@v2.0
         if: ${{ github.repository == 'ciromattia/kcc' }}
         with:
          api-token: '${{ secrets.SIGNPATH_API_TOKEN }}'