Automated submodule update: vrs (#357)

Summary:
This is an automated pull request to update the first-party submodule for [facebookresearch/vrs](https://github.com/facebookresearch/vrs).

New submodule commit: facebookresearch/vrs@225dce6

Pull Request resolved: #357

Test Plan: Ensure that CI jobs succeed on GitHub before landing.

Reviewed By: georges-berenger

Differential Revision: D96252949

fbshipit-source-id: cc60023a8822ef472f14a03d383004c786f77798

Author: facebook-github-bot