doc: use `cjs` as block code's type in `MockTimers`
Use cjs
instead of js
to show toggle button between CJS and ESM because corresponding example using mjs
exists.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Use cjs
instead of js
to show toggle button between CJS and ESM because corresponding example using mjs
exists.