Bump actions/attest-build-provenance from 1.4.4 to 2.0.0

Bumps [actions/attest-build-provenance](https://github.com/actions/attest-build-provenance) from 1.4.4 to 2.0.0.
- [Release notes](https://github.com/actions/attest-build-provenance/releases)
- [Changelog](https://github.com/actions/attest-build-provenance/blob/main/RELEASE.md)
- [Commits](actions/attest-build-provenance@v1.4.4...v2.0.0)

---
updated-dependencies:
- dependency-name: actions/attest-build-provenance
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/package.yml

@@ -37,7 +37,7 @@ jobs:
         run: |
           ./cake upload-core-github
       - name: Attest packages
-        uses: actions/attest-build-provenance@v1.4.4
+        uses: actions/attest-build-provenance@v2.0.0
         with:
           subject-path: out/pkg/debug/*.nupkg
       - name: Upload artifacts

.github/workflows/release.yml

@@ -36,7 +36,7 @@ jobs:
         run: |
           ./cake upload-core-nuget -c Release
       - name: Attest packages
-        uses: actions/attest-build-provenance@v1.4.4
+        uses: actions/attest-build-provenance@v2.0.0
         with:
           subject-path: out/pkg/release/*.nupkg
       - name: Upload artifacts