docs(test_utils): Update postman docs

[pixincreate]

Type of Change

• Refactoring
• Documentation

Description

Update postman documentation since we had previously made some changes w.r.t how the postman commands are passed.

Motivation and Context

I don't want to make people scream if it does not work.

How did you test it?

This command should fail to run postman tests

cargo run --package test_utils --bin test_utils -- --connector_name=<connector_name> --base_url=<base_url> --admin_api_key=<admin_api_key>

This command should run postman tests as expected.

cargo run --package test_utils --bin test_utils -- --connector-name=<connector_name> --base-url=<base_url> --admin-api-key=<admin_api_key>

Checklist

• I reviewed the submitted code