Bump Hl7.Fhir.Base from 5.6.1 to 5.7.0

Bumps [Hl7.Fhir.Base](/~https://github.com/FirelyTeam/firely-net-sdk) from 5.6.1 to 5.7.0.
- [Release notes](/~https://github.com/FirelyTeam/firely-net-sdk/releases)
- [Commits](FirelyTeam/firely-net-sdk@v5.6.1...v5.7.0)

---
updated-dependencies:
- dependency-name: Hl7.Fhir.Base
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Firely.Fhir.Packages.props

@@ -5,7 +5,7 @@
 		<TargetFrameworks>net8.0;netstandard2.0;</TargetFrameworks>
 		<Nullable>enable</Nullable>
 		<GeneratePackageOnBuild>false</GeneratePackageOnBuild>
-		<FhirNetSdkVersion>5.6.1</FhirNetSdkVersion>
+		<FhirNetSdkVersion>5.7.0</FhirNetSdkVersion>
 	</PropertyGroup>
 
     <!-- Solution-wide properties for NuGet packaging -->