chore(deps): bump actions/attest from 4.1.1 to 4.2.0 (hiero-ledger#2446)

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Author: dependabot[bot]

.github/workflows/publish.yml

@@ -47,7 +47,7 @@ jobs:
         run: python -m build
 
       - name: Generate build provenance attestations
-        uses: actions/attest@a1948c3f048ba23858d222213b7c278aabede763 # v4.1.1
+        uses: actions/attest@f7c74d28b9d84cb8768d0b8ca14a4bac6ef463e6 # v4.2.0
         with:
           subject-path: |
             dist/*.whl