Fixed ui-text label cropping out on larger font sizes

[gayanSandamal]

Description

The line height has been overridden from Vuetify's default value of 1.2rem, which becomes more noticeable with larger font sizes

Before

After

This doesn't required any doc update or E2E test updates

Related Issue(s)

https://github.com/FlowFuse/node-red-dashboard/issues/1358

Checklist

• [x] I have read the contribution guidelines
• [ ] Suitable unit/system level tests have been added and they pass
• [ ] Documentation has been updated
  • [ ] Upgrade instructions
  • [ ] Configuration details
  • [ ] Concepts
• [ ] Changes flowforge.yml?
  • [ ] Issue/PR raised on FlowFuse/helm to update ConfigMap Template
  • [ ] Issue/PR raised on FlowFuse/CloudProject to update values for Staging/Production

Labels

• [ ] Includes a DB migration? -> add the area:migration label