chore: Update release workflow to use OIDC publish mode (#214)

Author: simoneb

.github/workflows/release.yml

@@ -25,12 +25,6 @@ jobs:
     steps:
       - uses: nearform-actions/optic-release-automation-action@v4
         with:
-          npm-token: >-
-            ${{ secrets[format('NPM_TOKEN_{0}', github.actor)] ||
-            secrets.NPM_TOKEN }}
-          optic-token: >-
-            ${{ secrets[format('OPTIC_TOKEN_{0}', github.actor)] ||
-            secrets.OPTIC_TOKEN }}
+          publish-mode: oidc
           semver: ${{ github.event.inputs.semver }}
           commit-message: 'chore: release {version}'
-          provenance: true