Added v1.5.48 release notes

[Aaronontheweb]

1.5.48 August 29th 2025

Major Feature: Akka.Discovery.Dns

This release introduces the new Akka.Discovery.Dns module, providing native DNS-based service discovery for Akka.NET clusters! This powerful addition enables:

• DNS-based Service Discovery: Automatically discover Akka.NET nodes using DNS SRV and A records
• Cloud-Native Integration: Seamlessly integrate with Kubernetes DNS, Azure DNS, AWS Route 53, and other DNS providers
• Zero-Configuration Discovery: Works out-of-the-box with standard DNS infrastructure
• Cluster Bootstrap Support: Full integration with Akka.Management cluster bootstrap for automatic cluster formation

The DNS discovery mechanism is ideal for containerized environments, cloud deployments, and any infrastructure with DNS-based service registration.

Other Improvements:

• Update to Akka.NET v1.5.48
• Update to Akka.Hosting v1.5.48
• Make AWS ECS Service discovery mechanism public and non-sealed for extensibility - AWS ECS discovery can now be extended and customized
• Bump Azure.Identity dependencies

[Arkatufus]

LGTM