Correct typo in finder json
Correct typo in finder json

Added in
https://github.com/alphagov/whitehall/commit/94ae9a79a2e176072fc8d503f6b7e25fb9586a79

This can't be published at the moment because the base path does not
match the routes. It should be /topical-events throughout.

alphagov/whitehall,alphagov/whitehall,alphagov/whitehall,alphagov/whitehall