Stack Reference doc page should include mention of requireOutput() in the text and example(s)

[MitchellGerdisch]

Problem description

This page: https://www.pulumi.com/docs/intro/concepts/stack/#stackreferences discusses stack references and how to get outputs from another stack. The text and examples only discuss getOutput() The requireOutput() method should also be mentioned at least in the text and preferably also in the examples. It's not obvious this method exists and this doc page is where most people end up when trying to understand stack references.

• I saw a product documentation issue on the following URL: <URL> This page: https://www.pulumi.com/docs/intro/concepts/stack/#stackreferences

• I saw an issue on the following blog post: <URL>

• I had trouble finding the information that I needed: <URL>

• Other: <DETAILS>

Affected product version(s)

Suggestions for a fix