[release] Prepare release Resources.OperatingSystem-1.10.0-beta.1 (#2394)

Author: opentelemetrybot

src/OpenTelemetry.Resources.OperatingSystem/CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+## 1.10.0-beta.1
+
+Released 2024-Dec-09
+
 * Drop support for .NET 6 as this target is no longer supported
   and add .NET 8/.NET Standard 2.0 targets.
   ([#2169](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/pull/2169))