Downgrade OpenTelemetry.Api package to last stable version

Author: glucaci

src/WorkflowCore/WorkflowCore.csproj

@@ -26,7 +26,7 @@
     <PackageReference Include="System.Reflection.TypeExtensions" Version="4.7.0" />
     <PackageReference Include="System.Threading.Thread" Version="4.3.0" />
     <PackageReference Include="System.Linq.Queryable" Version="4.3.0" />
-    <PackageReference Include="OpenTelemetry.Api" Version="1.2.0-rc2" />
+    <PackageReference Include="OpenTelemetry.Api" Version="1.1.0" />
 	<AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleTo">
 		<_Parameter1>WorkflowCore.IntegrationTests</_Parameter1>
 	</AssemblyAttribute>