Changes the list of items a SSE connection will receive state updates to.

Request

• Base URL
  /rest (relative, and the document was published on a file host, not at the API’s origin)
• Auth
  none declared
• TypeScript
  https://skmtc.dev/openhab/apis/openhab-rest-api/docs/events/states/:connectionId/post.ts

  A function with typed inputs. Its response is checked against the schema.