Bump Hl7.Fhir.R4 from 5.12.2 to 6.0.1

---
updated-dependencies:
- dependency-name: Hl7.Fhir.R4
  dependency-version: 6.0.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

firely-validator-api.props

@@ -28,7 +28,7 @@
 	</PropertyGroup>
 
 	<PropertyGroup>
-		<FirelySdkVersion>5.12.2</FirelySdkVersion>
+		<FirelySdkVersion>6.0.1</FirelySdkVersion>
 	</PropertyGroup>
 
 	<PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">