…23855)

## **Description**

- New  definition added to labelling guidelines: `regression-develop`.
- Same PR on Mobile repo:
MetaMask/metamask-mobile#9142

## **Related issues**

- Fixes: None

## **Manual testing steps**

- None

## **Screenshots/Recordings**

- Preview available here:
https://github.com/MetaMask/metamask-extension/blob/08c910cf750017d0bf586a28578dbfad8d6599c1/.github/guidelines/LABELING_GUIDELINES.md

## **Pre-merge author checklist**

- [x] I’ve followed [MetaMask Coding
Standards](https://github.com/MetaMask/metamask-extension/blob/develop/.github/guidelines/CODING_GUIDELINES.md).
- [x] I've completed the PR template to the best of my ability
- [x] I’ve included tests if applicable
- [x] I’ve documented my code using [JSDoc](https://jsdoc.app/) format
if applicable
- [x] I’ve applied the right labels on the PR (see [labeling
guidelines](https://github.com/MetaMask/metamask-extension/blob/develop/.github/guidelines/LABELING_GUIDELINES.md)).
Not required for external contributors.

## **Pre-merge reviewer checklist**

- [ ] I've manually tested the PR (e.g. pull and build branch, run the
app, test code being changed).
- [ ] I confirm that this PR addresses all acceptance criteria described
in the ticket it closes and includes the necessary testing evidence such
as recordings and or screenshots.