Andrew Kushnir f4c55e464a docs: provide more info on the NO_ERRORS_SCHEMA schema (#42327)
The `NO_ERRORS_SCHEMA` schema can be used to ignore errors related to unknown elements or properties, but since it suppresses these errors it may also hide real problems in a template. This commit updates the `NO_ERRORS_SCHEMA` docs to mention that.

Closes #39454.

PR Close #42327
2021-06-07 10:46:34 -07:00
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