Update CHANGELOG.md

Co-authored-by: CAAshworth <claire.ashworth@digital.cabinet-office.gov.uk>

CHANGELOG.md

@@ -53,9 +53,10 @@ The [Button](https://design-system.service.gov.uk/components/button/) Nunjucks m
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 This was added in [pull request #3344: Adding optional id attribute to button component](https://github.com/alphagov/govuk-frontend/pull/3344). Thanks to [Tom Billington](https://github.com/TomBillingtonUK) for this contribution.
+
 ### Added a modifier for text input styles that accept sequences of digits
 
-A new `.govuk-input--extra-letter-spacing` class for [Text Input](https://design-system.service.gov.uk/components/text-input/) was added to increase readability of text inputs meant to receive sequences of digits (like security codes, references or phone numbers).
+We've added a new `.govuk-input--extra-letter-spacing` class for [Text Input](https://design-system.service.gov.uk/components/text-input/). This increases readability of text inputs that receive sequences of digits (like security codes, references or phone numbers).
 
 You can add it through the `classes` option when using Nunjucks, or directly in the `class` attribute of the `<input>` when using HTML.