build(deps-dev): update typescript-eslint monorepo to v6.15.0 #646

Job	Run time
Lint / Code	18s
Test / All tests	50s
Style / Format check	20s
Build / Build and prerender app	1m 20s
Performance / Lighthouse	2m 56s
Deploy preview / Deploy to Cloudflare Pages	27s
	6m 11s

Provide feedback