chore: Update secrets (#103)

## Description
<!-- Please include a summary of the change in your PR and what it's
fixing. -->

## Type of change
<!-- Please check the relevant option. -->

- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] New feature / enhancement (non-breaking change which adds
functionality)
- [ ] Security fix
- [ ] Bug fix (non-breaking change which fixes an issue)

## Checklist:
<!-- Please check applicable options. -->

- [ ] Add changelog entry following the [contributing
guide](../CONTRIBUTING.md#pull-requests)
- [ ] Documentation has been updated
- [ ] This change requires changes in testing:
  - [ ] unit tests
  - [ ] E2E tests

.github/workflows/release.yml

@@ -19,8 +19,8 @@ jobs:
       docker_image_name: newrelic/newrelic-k8s-operator
       chart_directory: charts/newrelic-k8s-operator
     secrets:
-      dockerhub_username: ${{ secrets.FSI_DOCKERHUB_USERNAME }}
-      dockerhub_token: ${{ secrets.FSI_DOCKERHUB_TOKEN }}
+      dockerhub_username: ${{ secrets.K8S_AGENTS_DOCKERHUB_USERNAME }}
+      dockerhub_token: ${{ secrets.K8S_AGENTS_DOCKERHUB_TOKEN }}
       bot_token: ${{ secrets.K8S_AGENTS_BOT_TOKEN }}
       slack_channel: ${{ secrets.K8S_AGENTS_SLACK_CHANNEL }}
       slack_token: ${{ secrets.K8S_AGENTS_SLACK_TOKEN }}