Docs for project displayName

[rogeliog]

Do you want to request a feature or report a bug?

Docs

What is the current behavior?
#4327 added displayName to MPR, but docs are still pending. This issue tracks it.

If the current behavior is a bug, please provide the steps to reproduce and either a repl.it demo through https://repl.it/languages/jest or a minimal repository on GitHub that we can yarn install and yarn test.

What is the expected behavior?

Please provide your exact Jest configuration and mention your Jest, node, yarn/npm version and operating system.

[thymikee]

We can add a note here: https://facebook.github.io/jest/docs/en/configuration.html#projects-array-string-projectconfig
Anybody willing to update the docs? 🙂

[thymikee]

Closed via #5600

[github-actions]

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