chore(deps): update opentelemetry-dotnet monorepo to 1.15.1

| datasource | package                                      | from   | to     |
| ---------- | -------------------------------------------- | ------ | ------ |
| nuget      | OpenTelemetry                                | 1.15.0 | 1.15.1 |
| nuget      | OpenTelemetry.Exporter.OpenTelemetryProtocol | 1.15.0 | 1.15.1 |


Signed-off-by: renovate-sh-app[bot] <219655108+renovate-sh-app[bot]@users.noreply.github.com>

Author: renovate-sh-app[bot]

dotnet/src/Grafana.Sigil/Grafana.Sigil.csproj

@@ -13,8 +13,8 @@
     <PackageReference Include="Google.Protobuf" Version="3.34.1" />
     <PackageReference Include="Grpc.Net.Client" Version="2.76.0" />
     <PackageReference Include="Grpc.Tools" Version="2.78.0" PrivateAssets="All" />
-    <PackageReference Include="OpenTelemetry" Version="1.15.0" />
-    <PackageReference Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" Version="1.15.0" />
+    <PackageReference Include="OpenTelemetry" Version="1.15.1" />
+    <PackageReference Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" Version="1.15.1" />
     <PackageReference Include="System.Text.Json" Version="10.0.5" />
     <PackageReference Include="System.Threading.Channels" Version="10.0.5" />
   </ItemGroup>