[Schema Inaccuracy] example for creating an installation token for an app shows incorrect example

[bartdevriendt]

Schema Inaccuracy

https://docs.github.com/en/rest/apps/apps?apiVersion=2022-11-28#create-an-installation-access-token-for-an-app

The example shows "repository" as body parameter while the documentation states repositories as an array of strings

Expected

The example should show a call with a repositories parameters with an array of strings

Reproduction Steps