Apply suggestions from code review

Pick up fix from open-telemetry/opentelemetry-dotnet-contrib#2829.

Author: martincostello

src/Grafana.OpenTelemetry/Grafana.OpenTelemetry.csproj

@@ -39,7 +39,7 @@
   <ItemGroup Label="Non-stable instrumentation packages with dependencies">
     <PackageReference Include="OpenTelemetry.Instrumentation.Cassandra" Version="1.0.0-beta.2" />
     <PackageReference Include="OpenTelemetry.Instrumentation.ElasticsearchClient" Version="1.0.0-beta.5" />
-    <PackageReference Include="OpenTelemetry.Instrumentation.EntityFrameworkCore" Version="1.12.0-beta.1" />
+    <PackageReference Include="OpenTelemetry.Instrumentation.EntityFrameworkCore" Version="1.12.0-beta.2" />
     <PackageReference Include="OpenTelemetry.Instrumentation.Hangfire" Version="1.9.0-beta.1" />
     <PackageReference Include="OpenTelemetry.Instrumentation.MySqlData" Version="1.0.0-beta.7" />
     <PackageReference Include="OpenTelemetry.Instrumentation.Quartz" Version="1.12.0-beta.1" />