chore(changelog): update CHANGELOG.md for v1.6.1 release with new features and maintenance status

Author: Blind-Striker

CHANGELOG.md

@@ -1,5 +1,44 @@
 # LocalStack .NET Client Change Log
 
+### [v1.6.1](https://github.com/localstack-dotnet/localstack-dotnet-client/releases/tag/v1.6.1)
+
+> ## ⚠️ Maintenance for LocalStack.NET v1.x and AWS SDK v3 ⚠️
+>
+> **Current Status**: The legacy v1.x LocalStack.NET libs which supports AWS SDK v3. It is now in **maintenance mode**.
+>
+> **Support Lifecycle**:
+>
+> - This version will only receive **critical security and bug fixes**
+> - **End-of-Life (EOL)**: July 31, 2026
+>
+> For active development, AWS SDK v4 support, and future features like Native AOT, please see the master branch.
+>
+> - 🚀 **[Go to master branch for v2.0 Development →](https://github.com/localstack-dotnet/localstack-dotnet-client/tree/master)**
+> - 📖 **[Read Full Roadmap & Migration Guide →](https://github.com/localstack-dotnet/localstack-dotnet-client/discussions/45)**
+
+#### 1. New Features
+
+- **Added Endpoints from [Localstack Python Client](https://github.com/localstack/localstack-python-client) v2.9:**
+  - **Account Management**
+  - **Certificate Manager Private Certificate Authority (ACMPCA)**
+  - **Bedrock**
+  - **Cloud Control API**
+  - **Code Build**
+  - **Code Connections**
+  - **Code Deploy**
+  - **Code Pipeline**
+  - **Elastic Transcoder**
+  - **MemoryDB for Redis**
+  - **Shield**
+  - **Verified Permissions**
+
+#### 2. General
+
+- **Testing Compatibility:**
+  - Successfully tested against LocalStack versions:
+    - **v3.7.1**
+    - **v4.6.0**
+
 ### [v1.6.0](https://github.com/localstack-dotnet/localstack-dotnet-client/releases/tag/v1.6.0)
 
 #### 1. General
@@ -225,4 +264,4 @@ Thanks to [petertownsend](https://github.com/petertownsend) for his contribution
 
 ### [v0.8.0.163](https://github.com/localstack-dotnet/localstack-dotnet-client/releases/tag/v0.8.0.163)
 
-- First release.
+- First release.

README.md

@@ -2,7 +2,7 @@
 
 [![Nuget](https://img.shields.io/nuget/dt/LocalStack.Client)](https://www.nuget.org/packages/LocalStack.Client/) [![NuGet v2.x](https://img.shields.io/endpoint?url=https%3A%2F%2Fyvfdbfas85.execute-api.eu-central-1.amazonaws.com%2Flive%2F%3Fpackage%3Dlocalstack.client%26source%3Dnuget%26track%3D2%26includeprerelease%3Dtrue%26label%3Dnuget)](https://www.nuget.org/packages/LocalStack.Client/) [![NuGet v1.x](https://img.shields.io/endpoint?url=https%3A%2F%2Fyvfdbfas85.execute-api.eu-central-1.amazonaws.com%2Flive%2F%3Fpackage%3Dlocalstack.client%26source%3Dnuget%26track%3D1%26includeprerelease%3Dtrue%26label%3Dnuget)](https://www.nuget.org/packages/LocalStack.Client/) [![CI/CD Pipeline](https://github.com/localstack-dotnet/localstack-dotnet-client/actions/workflows/ci-cd.yml/badge.svg)](https://github.com/localstack-dotnet/localstack-dotnet-client/actions/workflows/ci-cd.yml) [![Security](https://github.com/localstack-dotnet/localstack-dotnet-client/actions/workflows/github-code-scanning/codeql/badge.svg)](https://github.com/localstack-dotnet/localstack-dotnet-client/actions/workflows/github-code-scanning/codeql) [![macOS Tests](https://img.shields.io/endpoint?url=https%3A%2F%2Fyvfdbfas85.execute-api.eu-central-1.amazonaws.com%2Flive%2Fbadge%2Ftests%2Fmacos%3Flabel%3DTests%26track%3Dv1)](https://yvfdbfas85.execute-api.eu-central-1.amazonaws.com/live/redirect/test-results/macos?track=v1)
 
-> ## ⚠️ Maintenance Branch for AWS SDK v3 ⚠️
+> ## ⚠️ Maintenance for LocalStack.NET v1.x and AWS SDK v3 ⚠️
 >
 > **Current Status**: This branch contains the legacy v1.x codebase which supports AWS SDK v3. It is now in **maintenance mode**.
 >
@@ -14,7 +14,7 @@
 > For active development, AWS SDK v4 support, and future features like Native AOT, please see the master branch.
 >
 > - 🚀 **[Go to master branch for v2.0 Development →](https://github.com/localstack-dotnet/localstack-dotnet-client/tree/master)**
-> - 📖 **[Read Full Roadmap & Migration Guide →](https://github.com/localstack-dotnet/localstack-dotnet-client/discussions/45)**
+> - 📖 **[Read Full Roadmap →](https://github.com/localstack-dotnet/localstack-dotnet-client/discussions/45)**
 
 **Version Strategy**: