Update en.json - small typo

[LeedsDBA]

Type of change

• [ ] Dependency upgrade
• [x] Bugfix (non-breaking change which fixes an issue)
• [ ] New feature
• [ ] Code quality improvements to existing code or addition of tests

Bugfix/documentation - not sure which one, but very minor change to translations for en.json.

Not contributed before, so shout if anything incorrect :)

[LeedsDBA]

need help @robinostlund - failed on label, but can't add label (bug?) now

[robinostlund]

Thanks @LeedsDBA i added the label 😄