Migrate to actions/attest

Author: Chocobo1

.github/workflows/build.yaml

@@ -174,6 +174,6 @@ jobs:
           compression-level: 9
 
       - name: Generate build provenace attestations
-        uses: actions/attest-build-provenance@v4
+        uses: actions/attest@v4
         with:
           subject-path: opus-tools/**