chore(deps): bump OpenTelemetry.Exporter.Zipkin, OpenTelemetry and Op…

…enTelemetry.Api

Bumps [OpenTelemetry.Exporter.Zipkin](https://github.com/open-telemetry/opentelemetry-dotnet), [OpenTelemetry](https://github.com/open-telemetry/opentelemetry-dotnet) and [OpenTelemetry.Api](https://github.com/open-telemetry/opentelemetry-dotnet). These dependencies needed to be updated together.

Updates `OpenTelemetry.Exporter.Zipkin` from 1.6.0 to 1.8.0
- [Release notes](https://github.com/open-telemetry/opentelemetry-dotnet/releases)
- [Commits](open-telemetry/opentelemetry-dotnet@core-1.6.0...core-1.8.0)

Updates `OpenTelemetry` from 1.6.0 to 1.8.0
- [Release notes](https://github.com/open-telemetry/opentelemetry-dotnet/releases)
- [Commits](open-telemetry/opentelemetry-dotnet@core-1.6.0...core-1.8.0)

Updates `OpenTelemetry.Api` from 1.6.0 to 1.8.0
- [Release notes](https://github.com/open-telemetry/opentelemetry-dotnet/releases)
- [Commits](open-telemetry/opentelemetry-dotnet@core-1.6.0...core-1.8.0)

---
updated-dependencies:
- dependency-name: OpenTelemetry.Exporter.Zipkin
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: OpenTelemetry
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: OpenTelemetry.Api
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

src/Benchmarks/Benchmarks.csproj

@@ -15,7 +15,7 @@
     <ItemGroup>
       <PackageReference Include="Microsoft.Extensions.Hosting" Version="8.0.0" />
       <PackageReference Include="Microsoft.Extensions.Logging" Version="8.0.0" />
-      <PackageReference Include="OpenTelemetry.Exporter.Zipkin" Version="1.6.0" />
+      <PackageReference Include="OpenTelemetry.Exporter.Zipkin" Version="1.8.0" />
       <PackageReference Include="OpenTelemetry.Instrumentation.GrpcNetClient" Version="1.6.0-beta.3" />
       <PackageReference Include="OpenTelemetry.Instrumentation.Http" Version="1.6.0-beta.3" />
     </ItemGroup>