Add changelog entry for b96defb

CHANGELOG.md

@@ -11,6 +11,7 @@
 - Transactional header defaults to wrapping underneath the logo without the need for a modifier ([Issue 720](https://github.com/nhsuk/nhsuk-frontend/issues/720)).
 - Add width, height, stroke and fill attributes to inline SVGs in order that they render at appropriate sizes when viewed with disabled/broken/missing CSS  ([PR 761](https://github.com/nhsuk/nhsuk-frontend/pull/761)).
 - Search input focus state style (desktop) – fix border width ([Issue 768](https://github.com/nhsuk/nhsuk-frontend/issues/768), [PR 771](https://github.com/nhsuk/nhsuk-frontend/pull/771)).
+- Stop polyfilling details elements in browsers that support it natively since the polyfill was causing issues with JAWS/Firefox ([Issue 754](https://github.com/nhsuk/nhsuk-frontend/issues/754), [PR 773](https://github.com/nhsuk/nhsuk-frontend/pull/773))
 
 ## 5.1.0 - 14 May 2021