Create example: Templating in a multiline string

[cari-lynn]

Why

A common use case for Kubernetes ConfigMaps and Secrets are to put values in a multiline string, which may need to be templated. Templating that multiline string isn’t obvious (it requires yaml.encode()).

What

There exists an example of this. Put this or another example into the official docs.

How

Either in the playground or in the carvel.dev/ytt docs.

Here is a request for this

[toransahu]

+1