chore(deps): update actions/checkout action to v6 #18131

Job	Run time
Testing exports integrity	1m 38s
Examples - Normal	5m 55s
Validating dev-tests (cjs)	1m 26s
Validating dev-tests (esm)	1m 31s
🧹 Prettier Check	1m 48s
Linting Check / eslint	1m 40s
Watcher Unit Test on Node (windows-latest) and GraphQL v16	1m 42s
Watcher Unit Test on Node 20 (ubuntu-latest) and GraphQL v16	1m 40s
Watcher Unit Test on Node 20 (ubuntu-latest) and GraphQL v15	1m 43s
Unit Test on Node 20 (ubuntu-latest) and GraphQL v16	2m 5s
Unit Test on Node 22 (ubuntu-latest) and GraphQL v15	2m 12s
Unit Test on Node 20 (ubuntu-latest) and GraphQL v15	2m 5s
Unit Test on Node 24 (ubuntu-latest) and GraphQL v16	1m 47s
Unit Test on Node (windows-latest) and GraphQL v16	2m 5s
Unit Test on Node 22 (ubuntu-latest) and GraphQL v16	1m 58s
Unit Test on Node 24 (ubuntu-latest) and GraphQL v15	1m 55s
	33m 10s

Provide feedback