[ReleasePR healthcareapis] Migrate to net track2 for some resource-manager readmes batch 3 (#2478)

Create to sync Azure/azure-rest-api-specs#21241
[ReCreate this PR](https://github.com/azure-resource-manager-schemas/compare/main...azure-sdk:sdkAuto/healthcareapis?expand=1)

Author: msftbot[bot]