Fix documentation on using transient services

[Ryman]

cc #51

Description

The documentation for setting up transient services was incorrect and references a scope property which isn't accepted by the Typescript compiler.

Checklist

• the pull request title describes what this PR does (not a vague title like Update index.md)
• the pull request targets the default branch of the repository (develop)
• the code follows the established code style of the repository
  • npm run prettier:check passes
  • npm run lint:check passes
• tests are added for the changes I made (if any source code was modified)
• documentation added or updated
• I have run the project locally and verified that there are no errors

[Ryman]

@attilaorosz (pinging you as you're the first human in the review history of master) Can you take a look at this?

[attilaorosz]

The problem is that the latest dev branch has it and the documentation should be aligned with that. Unfortunately it is not released.

@NoNameProvided any plans on a new release?