cryptpad: update cryptpad-docker to v4.14.1-nginx

[roobre]

Description of the change

Image bump

Benefits

Possible drawbacks

Applicable issues

• fixes #

Additional information

Checklist

• [x] Title of the PR starts with chart name (e.g. [home-assistant])
• [x] Chart version bumped in Chart.yaml according to semver.
• [x] Chart artifacthub.io/changes changelog annotation has been updated in Chart.yaml. See Artifact Hub documentation for more info.
• [ ] Variables have been documented in the values.yaml file.