fix title underline (#1126)

Author: isegall-da

docs/src/community/docker-compose-helm-chart.rst

@@ -6,15 +6,15 @@
 .. _docker_compose_helm_chart:
 
 Alternative Docker Compose Deployment
-==================================
+=====================================
 
-This guide introduces a community-contributed Docker Compose solution for deploying Canton validator nodes and supporting infrastructure, following the ``x-docker`` standard used by Mario Delgado’s team for onboarding blockchains. 
-Note that while it was tested during a scheduled upgrade on DevNet, that required 
+This guide introduces a community-contributed Docker Compose solution for deploying Canton validator nodes and supporting infrastructure, following the ``x-docker`` standard used by Mario Delgado’s team for onboarding blockchains.
+Note that while it was tested during a scheduled upgrade on DevNet, that required
 updating the ``.env`` file with the migration ID, renaming the databases (with a planned change to use standardized names like ``participant_${MIGRATION_ID}`` and ``validator_${MIGRATION_ID}``), and including ``validator-migration.yaml`` as part of the migration setup. For further information, please contact the authors of the contribution.
-The solution emphasizes extensibility, operational flexibility, and integration with broader infrastructure. 
+The solution emphasizes extensibility, operational flexibility, and integration with broader infrastructure.
 For the officially supported docker-compose deployment, refer to :ref:`Docker Compose-Based Deployment of a Validator Node <compose_validator>`.
 
-Thanks to Mario Delgado for sharing this solution in a community discussion. 
+Thanks to Mario Delgado for sharing this solution in a community discussion.
 For more details and future updates, see the `CryptoManufaktur-io/canton-docker <https://github.com/CryptoManufaktur-io/canton-docker>`_ repository.
 
 Key Features of This Solution
@@ -26,4 +26,4 @@ Key Features of This Solution
 - Support for custom overrides (``custom.yml``) and environment variables, enabling advanced configuration without modifying the base files.
 - Integration guidance for Traefik (proxy) and Prometheus (monitoring) via ``central-proxy-docker`` and ``:ext-network.yml``.
 - Experimental Helm chart for Kubernetes environments (in progress as of June 2025).
-- Disaster recovery features (in progress as of June 2025).
+- Disaster recovery features (in progress as of June 2025).