docs: added about correcting checkbox widget focus handlers across all UI libraries

Fixes the checkbox widget to use current value instead of event target in
onFocus/onBlur handlers across all UI libraries:
- core
- chakra-ui
- daisyui
- fluentui-rc
- mui
- primereact
- semantic-ui

Fixes rjsf-team#4704

Author: chathuraa

CHANGELOG.md

@@ -21,11 +21,36 @@ should change the heading of the (upcoming) version to include a major version b
 ## @rjsf/core
 
 - Added support for dynamic UI schema in array fields - the `items` property in `uiSchema` can now accept a function that returns a UI schema based on the array item's data, index, and form context ([#4706](https://github.com/rjsf-team/react-jsonschema-form/pull/4706))
+- Fixed checkbox widget to use current value instead of event target in onFocus/onBlur handlers, fixing [#4704](https://github.com/rjsf-team/react-jsonschema-form/issues/4704)
 
 ## @rjsf/utils
 
 - Updated `UiSchema` type to support dynamic array item UI schemas - the `items` property can now be either a `UiSchema` object or a function that returns a `UiSchema` ([#4706](https://github.com/rjsf-team/react-jsonschema-form/pull/4706))
 
+## @rjsf/chakra-ui
+
+- Fixed checkbox widget to use current value instead of event target in onFocus/onBlur handlers, fixing [#4704](https://github.com/rjsf-team/react-jsonschema-form/issues/4704)
+
+## @rjsf/daisyui
+
+- Fixed checkbox widget to use current value instead of event target in onFocus/onBlur handlers, fixing [#4704](https://github.com/rjsf-team/react-jsonschema-form/issues/4704)
+
+## @rjsf/fluentui-rc
+
+- Fixed checkbox widget to use current value instead of event target in onFocus/onBlur handlers, fixing [#4704](https://github.com/rjsf-team/react-jsonschema-form/issues/4704)
+
+## @rjsf/mui
+
+- Fixed checkbox widget to use current value instead of event target in onFocus/onBlur handlers, fixing [#4704](https://github.com/rjsf-team/react-jsonschema-form/issues/4704)
+
+## @rjsf/primereact
+
+- Fixed checkbox widget to use current value instead of event target in onFocus/onBlur handlers, fixing [#4704](https://github.com/rjsf-team/react-jsonschema-form/issues/4704)
+
+## @rjsf/semantic-ui
+
+- Fixed checkbox widget to use current value instead of event target in onFocus/onBlur handlers, fixing [#4704](https://github.com/rjsf-team/react-jsonschema-form/issues/4704)
+
 ## Dev / docs / playground
 
 - Added comprehensive documentation for dynamic UI schema feature with TypeScript examples ([#4706](https://github.com/rjsf-team/react-jsonschema-form/pull/4706))