bump up the imgui.net version

Author: zaafar

src/ImGui.NET/ImGui.NET.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <Description>A .NET wrapper for the Dear ImGui library.</Description>
-    <AssemblyVersion>1.89.7.1</AssemblyVersion>
+    <AssemblyVersion>1.89.9.1</AssemblyVersion>
     <Authors>Eric Mellino</Authors>
     <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>