lock openapi-to-typespec test config

[tadelesh]

fix: #4913

[azure-pipelines]

You may test this build by running autorest --reset and then either:

---

Add the following CLI flags

Pacakge	Flag	Description
@autorest/core	--version:https://tinyurl.com/29ctz7ys	For changes to autorest core.
@autorest/modelerfour	--use:https://tinyurl.com/27h5cn7y	For changes to modelerfour.

Or with all

autorest --version:https://tinyurl.com/29ctz7ys --use:https://tinyurl.com/27h5cn7y

---

or use the following in your autorest configuration:

# For changes to autorest core
version: "https://tinyurl.com/29ctz7ys"

# For changes to modelerfour
use-extension:
  "@autorest/modelerfour": "https://tinyurl.com/27h5cn7y"

---

If this build is good for you, give this comment a thumbs up. (👍) And you should run `autorest --reset` again once you're finished testing to remove it.