Bump actions/attest-build-provenance from 1 to 2 (#4)

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

Author: dependabot[bot]

.github/workflows/release.yml

@@ -36,6 +36,6 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           GPG_FINGERPRINT: ${{ steps.import_gpg.outputs.fingerprint }}
-      - uses: actions/attest-build-provenance@v1
+      - uses: actions/attest-build-provenance@v2
         with:
           subject-path: "dist/checksums.txt"