Release v5.1.1: Fix README badges in NuGet package

Author: Serha

README.md

@@ -1,6 +1,6 @@
 # databento-dotnet
 
-[![NuGet](https://img.shields.io/badge/NuGet-v5.1.0-blue)](https://www.nuget.org/packages/Databento.Client)
+[![NuGet](https://img.shields.io/badge/NuGet-v5.1.1-blue)](https://www.nuget.org/packages/Databento.Client)
 [![Downloads](https://img.shields.io/badge/Downloads-12K-blue)](https://www.nuget.org/packages/Databento.Client)
 [![.NET](https://img.shields.io/badge/.NET-8.0%20%7C%209.0-purple)](https://dotnet.microsoft.com/)
 [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](LICENSE)

Readme_For_Coding_Agents.md

@@ -2,7 +2,7 @@
 
 > **For AI coding agents**: This document is optimized for programmatic consumption by agentic code tools (Claude Code CLI, Cursor, GitHub Copilot Workspace, etc.). Use this as your primary reference when working with the Databento.Client library.
 
-**Library**: `Databento.Client` v5.1.0
+**Library**: `Databento.Client` v5.1.1
 **Package**: `dotnet add package Databento.Client`
 **Runtime**: .NET 8.0 / 9.0
 **Platforms**: Windows x64 (NuGet) | Linux/macOS (build from source)

src/Databento.Client/Databento.Client.csproj

@@ -9,7 +9,7 @@
 
     <!-- Package Information -->
     <PackageId>Databento.Client</PackageId>
-    <Version>5.1.0</Version>
+    <Version>5.1.1</Version>
     <Authors>Alparse</Authors>
     <Company>Databento</Company>
     <Product>databento-dotnet</Product>
@@ -20,7 +20,7 @@
     <RepositoryType>git</RepositoryType>
     <PackageProjectUrl>https://github.com/Alparse/databento-dotnet</PackageProjectUrl>
     <PackageReadmeFile>README.md</PackageReadmeFile>
-    <PackageReleaseNotes>v5.1.0: Fix SecurityMasterRecord JSON deserialization - LotSize, VotePerSec now decimal?, SharesOutstanding and SharesOutstandingDate now string? to match API</PackageReleaseNotes>
+    <PackageReleaseNotes>v5.1.1: Fix SecurityMasterRecord JSON deserialization - LotSize, VotePerSec now decimal?, SharesOutstanding and SharesOutstandingDate now string? to match API</PackageReleaseNotes>
     <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
 
     <!-- XML Documentation -->