Updating version of add-and-commit in readme example

[jamesETsmith]

General

First off, thanks for this great tool! When I started playing around with it earlier today I noticed I was getting some warnings about Node.js because I copy and pasted the example from the readme that used an old version of add-and-commit. After updating the version to the latest, the example ran without a problem.

Details

For reference, here's the error github actions was showing:

Node.js 12 actions are deprecated. For more information see: https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/. Please update the following actions to use Node.js 16: EndBug/add-and-commit@v4

[DoozyX]

Thanks, Sorry for the delay. Wasn't that much active and just got update regarding this