🐛 Fix duplicate volumeMounts in hcloud-csi controller

[guettli]

Summary

• remove the duplicated volumeMounts key from the hcloud-csi-driver container in charts/hcloud-csi/templates/controller/deployment.yaml
• bump the chart version to 1.3.1

Why

The template currently renders volumeMounts twice in the same YAML mapping for the hcloud-csi-driver container. Helm will still render the manifest, but strict YAML consumers reject it as invalid due to the duplicate key.

This showed up downstream when rendering the chart and passing the result to a YAML parser:

mapping key "volumeMounts" already defined

The later volumeMounts block is already the complete one because it also appends controller.extraVolumeMounts, so removing the earlier block is the minimal fix.

Validation

• helm template test charts/hcloud-csi > /tmp/hcloud-csi-template.yaml
• parsed /tmp/hcloud-csi-template.yaml successfully with PyYAML