Automated submodule update: vrs (#152)

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@e228c7f

Pull Request resolved: #152

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

Reviewed By: georges-berenger

Differential Revision: D69058978

fbshipit-source-id: e9b44fe02db3f53c919f0c0fb4ade8752dbab32f