Update qos-stable-latency.yaml with single flowDescription fixing protocolIn/protocolOut

[emil-cheung]

This pull request is to address https://github.com/camaraproject/QualityOnDemand/issues/32

[hdamker]

As discussed within https://github.com/camaraproject/QualityOnDemand/blob/main/documentation/MeetingMinutes/MOM-2022-09-23.md:

• The proposed changes to v0.1.0 of stable-latency API will be superseeded by v0.8.0 (deleting the stable-latency API)
• The addressed issue of ambiguity of protocolIn/protocolOut parameters will not exist in v0.8.0 as these parameters are obmitted in the v0.8.0 version
• The pull request will be closed. The proposal of a flowinfo structure should be preserved as feature request in the backlog.

Created #51 for that.