Update plugins-and-utils.md

[klis87]

Checklist

• [x] only relevant code is changed (make a diff before you submit the PR)
• [ ] run tests npm run test
• [ ] tests are included

Checklist (for documentation change)

• [x] only relevant documentation part is changed (make a diff before you submit the PR)
• [x] motivation/reason is provided

[klis87]

Referencing https://github.com/i18next/i18next/issues/1792