Change hardcoded-tmp-directory-extend example to follow the schema

[carloshbcabral]

Summary

Change hardcoded-tmp-directory-extend example to follow the schema:

ruff/ruff.schema.json

Lines 896 to 901 in 1e91a09

	"hardcoded-tmp-directory-extend": {
	"description": "A list of directories to consider temporary, in addition to those specified by `hardcoded-tmp-directory`.",
	"type": [
	"array",
	"null"
	],

[github-actions]

ruff-ecosystem results

Linter (stable)

✅ ecosystem check detected no linter changes.

Linter (preview)

✅ ecosystem check detected no linter changes.

[zanieb]

Thanks! Welcome to the project.