"format" is missing from Text input attributes

In this thread https://forum.buildkite.community/t/regex-validation-for-step-input/1260/2 there is a new feature "format" which is block.text optional attribute. Now it's missing in docs

Start by locating the documentation section for Text input attributes and read the linked forum thread for the definition of the new format attribute. Done means the format optional attribute is documented accurately alongside the other block.text attributes.

Written by the indexing model from the issue text.