ci(audit-signatures): install latest corepack so the new npm signing key is available

Author: travi

.github/workflows/node-ci.yml

@@ -25,6 +25,7 @@ jobs:
           node-version-file: .nvmrc
           cache: npm
       - run: npm clean-install
+      - run: npm install --global corepack@latest
       - run: corepack npm audit signatures
       - run: npm test
       - uses: codecov/codecov-action@13ce06bfc6bbe3ecf90edbbf1bc32fe5978ca1d3 # v5.3.1