chore(deps): update dependency opentelemetry.instrumentation.aspnetcore to 1.12.0 (#505)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [OpenTelemetry.Instrumentation.AspNetCore](https://opentelemetry.io/)
([source](https://redirect.github.com/open-telemetry/opentelemetry-dotnet-contrib))
| `1.9.0` -> `1.12.0` |
[![age](https://developer.mend.io/api/mc/badges/age/nuget/OpenTelemetry.Instrumentation.AspNetCore/1.12.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/nuget/OpenTelemetry.Instrumentation.AspNetCore/1.12.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/nuget/OpenTelemetry.Instrumentation.AspNetCore/1.9.0/1.12.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/nuget/OpenTelemetry.Instrumentation.AspNetCore/1.9.0/1.12.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

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samples/AspNetCore/Samples.AspNetCore.csproj

@@ -12,7 +12,7 @@
 
   <ItemGroup>
     <PackageReference Include="OpenTelemetry.Extensions.Hosting" Version="1.12.0" />
-    <PackageReference Include="OpenTelemetry.Instrumentation.AspNetCore" Version="1.9.0" />
+    <PackageReference Include="OpenTelemetry.Instrumentation.AspNetCore" Version="1.12.0" />
     <PackageReference Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" Version="1.12.0" />
   </ItemGroup>