chore(deps): update dependency opentelemetry.api to v1.8.0

Author: renovate[bot]

src/OpenFeature.Contrib.Hooks.Otel/OpenFeature.Contrib.Hooks.Otel.csproj

@@ -11,7 +11,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="OpenTelemetry.Api" Version="1.7.0" />
+    <PackageReference Include="OpenTelemetry.Api" Version="1.8.0" />
   </ItemGroup>
 
 </Project>