Update MongoDB.md

[zakuni]

fix incorrect variable name for MongoMemoryServer object(both mongoServer and mongod were used) in the document.

Should I update CHANGELOG for fixing document? plz tell me if necessary.

Summary

It seems two different variable names(mongod and mongoServer) are used for MongoMemoryServer, and since then check below(line33-36) won't work.

if (!mongod.isRunning) {
  await mongod.start();
}

I chose to use mongod to adjust example(https://github.com/vladgolubev/jest-mongodb/blob/master/setup.js), even though mongoServer seems clearer.

Closes #7320

Test plan

no test due to fixing document.

[facebook-github-bot]

Thank you for your pull request and welcome to our community. We require contributors to sign our Contributor License Agreement, and we don't seem to have you on file. In order for us to review and merge your code, please sign up at https://code.facebook.com/cla. If you are contributing on behalf of someone else (eg your employer), the individual CLA may not be sufficient and your employer may need the corporate CLA signed.

If you have received this in error or have any questions, please contact us at [email protected]. Thanks!

[facebook-github-bot]

Thank you for signing our Contributor License Agreement. We can now accept your code for this (and any) Facebook open source project. Thanks!

[SimenB]

Thanks for the PR! Could you update the versioned docs as well?

[zakuni]

@SimenB Thanks, I've done it.

[github-actions]

This pull request has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.
Please note this issue tracker is not a help forum. We recommend using StackOverflow or our discord channel for questions.