Add missing ui.panel.config.labels.headers.description

[NoRi2909]

Proposed change

The header "Description" for the Labels list only shows up as optional in a narrow view like on mobile. But then it's currently not localized as the string for the ui.panel.config.labels.headers.description key referenced here

frontend/src/panels/config/labels/ha-config-labels.ts

Line 132 in 455cd04

title: localize("ui.panel.config.labels.headers.description"),

is missing:

This PR adds the missing string to en.json.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New feature (thank you!)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue or discussion:
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
• There is no commented out code in this PR.
• Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io