Add changelog entry for JavaScript configuration

[romaricpascal]

What

Add an entry in the changelog to highlight which components can now be configured in JavaScript and how

Why

We've added the possibility to configure components through JavaScript, but no entry in the changelog (my oversight, sorry). This concerns:

• Allow button config set via data attributes to be passed when initialising the component in JavaScript #2836 The Button component
• Allow character count config set via data attributes to be passed when initialising the component in JavaScript #2837 The CharacterCount component
• Allow error summary config set via data attributes to be passed when initialising the component in JavaScript #2838 The ErrorSummary component
• Allow notification banner config set via data attributes to be passed when initialising the component in JavaScript #2839 The NotificationBanner component

Who needs to work on this

Developers

Who needs to review this

Developers, Technical Writers

Done when

• Changelog entry is added