Bump OpenTelemetry.Instrumentation.Http (#1548)

Bumps [OpenTelemetry.Instrumentation.Http](https://github.com/open-telemetry/opentelemetry-dotnet) from 1.7.0 to 1.8.1.
- [Release notes](https://github.com/open-telemetry/opentelemetry-dotnet/releases)
- [Commits](open-telemetry/opentelemetry-dotnet@core-1.7.0...Instrumentation.Http-1.8.1)

---
updated-dependencies:
- dependency-name: OpenTelemetry.Instrumentation.Http
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

examples/openTelemetryConsole/openTelemetryConsole.csproj

@@ -8,7 +8,7 @@
 
     <ItemGroup>
         <PackageReference Include="OpenTelemetry.Exporter.Console" Version="1.7.0" />
-        <PackageReference Include="OpenTelemetry.Instrumentation.Http" Version="1.7.0" />
+        <PackageReference Include="OpenTelemetry.Instrumentation.Http" Version="1.8.1" />
     </ItemGroup>
 
 </Project>