[BUG] CORS errors when sending requests to `GET /deployed-triggers/{trigger_id}`

**Describe the bug**

I get CORS errors when sending requests to the [Get deployed trigger](https://pipedream.com/docs/connect/api-reference/get-deployed-trigger) endpoint. I don't get CORS errors for any other endpoints - just this one.

I'm using the Typescript SDK (2.1.0) browser client to make these requests, but the errors also appears if I manually make the request with the browser's Fetch API.

**To Reproduce**
Steps to reproduce the behavior:

1. Create a browser client with `createFrontendClient()`
2. Deploy a trigger with `client.triggers.deploy()`
3. Try to get the trigger with `client.deployedTriggers.retrieve()`

At this point, the request will fail with CORS errors. If I run the browser without CORS protections, it passes and I can see the correct response data.

**Expected behavior**
The request should not fail with CORS errors and should work from the browser.