Fix update change log automation (#300)

Author: trask

.github/workflows/release.yml

@@ -152,6 +152,8 @@ jobs:
                             opentelemetry-jmx-metrics.jar
 
       - name: Update the change log with the release date
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
           date=$(gh release view v$VERSION --json publishedAt --jq .publishedAt | sed 's/T.*//')
           sed -ri "s/## Version $VERSION .*/## Version $VERSION ($date)/" CHANGELOG.md