run mdoc with newer Toolkit version (0.7.0, was 0.1.7)

[SethTisue]

No description provided.

[SethTisue]

error: http-client-request-body.md:20:1: Exception when sending request: POST https://example.com/
val response = quickRequest
^
sttp.client4.SttpClientException$ResponseHandlingException: Exception when sending request: POST https://example.com/
	at sttp.client4.SttpClientExceptionExtensions.defaultExceptionToSttpClientException(SttpClientExceptionExtensions.scala:30)
	at sttp.client4.SttpClientExceptionExtensions.defaultExceptionToSttpClientException$(SttpClientExceptionExtensions.scala:12)

[bishabosha]

this i think can be solved with mdoc:fail if example.com is expected to reject POST always, or swap to httpbin.org (which is flaky but at least has an endpoint)

[bishabosha]

I went with changing the URL, also figured that the imports for Websockets are now outdated with the newer toolkit