fix: transition-timing function update from the dropdown ui (#3989)

## Description

Fixes #3957 
Looks like there is a props mis-match during the refactoring from
shorthand to using long hand properties. Now changed it to use the same
convention every where for timing function.

## Steps for reproduction

- Add a new transition layer.
- Update the `timing` from the transition-ui floating panel.
- The updated function from the select should reflect in UI, floating
panel content box and in the style-panel layer name.

## Code Review

- [ ] hi @kof, I need you to do
  - conceptual review (architecture, feature-correctness)
  - detailed review (read every line)
  - test it on preview

## Before requesting a review

- [x] made a self-review

## Before merging

- [x] tested locally and on preview environment (preview dev login:
5de6)

apps/builder/app/builder/features/style-panel/sections/transitions/transition-content.tsx

@@ -135,7 +135,7 @@ export const TransitionContent = ({
     options: StyleUpdateOptions = { isEphemeral: false }
   ) => {
     const value: Array<UnitValue | KeywordValue> = Object.values({
-      ...{ property, duration, delay, timingFunction },
+      ...{ property, duration, delay, timing: timingFunction },
       ...params,
     }).filter<UnitValue | KeywordValue>(
       (item): item is UnitValue | KeywordValue => item != null