[BUG] Browserless Integration Using Legacy Endpoint - Causing 403 Errors

[vunguyenhung]

Describe the bug
The Browserless integration in Pipedream is routing requests to a legacy endpoint that no longer works, causing 403 errors with the message: "This URL is a legacy endpoint, please use https://production-sfo.browserless.io/ for REST API calls"

To Reproduce

1. Create a workflow with a Browserless step
2. Use any Browserless action (e.g., _makeRequest with /function endpoint)
3. Execute the step
4. Observe requests are being routed to an old/legacy endpoint
   Error Message: "This URL is a legacy endpoint, please use https://production-sfo.browserless.io/ for REST API calls and wss://production-sfo.browserless.io/ for library and puppeteer usage. See more at https://docs.browserless.io/overview/connection-urlss"

Expected behavior
Requests should route to https://production-sfo.browserless.io/

Screenshots
If applicable, add screenshots to help explain your problem. Note that the screenshots will be displayed publicly.

Additional context
Raised by a customer here: https://pipedream-users.slack.com/archives/CMZG4EBJ9/p1753856345865189

For component dev
I've recently added base_url field into the Connection information, you can use it for the Base URL

[vunguyenhung]

Hello everyone, I have tested this PR and there're some test cases failed or needed improvement.

Please check the test report below for more information
https://vunguyenhung.notion.site/BUG-Browserless-Integration-Using-Legacy-Endpoint-Causing-403-Errors-241bf548bb5e81d4a3a7c73ad6fc26b2

[vunguyenhung]

Hi everyone, all test cases are passed! Ready for release!

Test report
https://vunguyenhung.notion.site/BUG-Browserless-Integration-Using-Legacy-Endpoint-Causing-403-Errors-241bf548bb5e81d4a3a7c73ad6fc26b2