Bump actions/attest-build-provenance in the actions group (#1077)

Author: dependabot[bot]

.github/workflows/build.yml

@@ -78,7 +78,7 @@ jobs:
       run: ./eng/common/cibuild.sh -configuration Release -prepareMachine
 
     - name: Attest artifacts
-      uses: actions/attest-build-provenance@db473fddc028af60658334401dc6fa3ffd8669fd # v2.3.0
+      uses: actions/attest-build-provenance@e8998f949152b193b063cb0ec769d69d929409be # v2.4.0
       if: |
         runner.os == 'Windows' &&
         github.event.repository.fork == false &&