Remove hardcoded Version from TeaPie.csproj to inherit from Directory.Build.props

The csproj had Version set to 1.5.2 which overrode the 1.6.0 defined in
src/Directory.Build.props, causing NuGet to publish the wrong version.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: Burgyn

src/TeaPie/TeaPie.csproj

@@ -9,7 +9,6 @@
 
   <PropertyGroup>
     <OutputType>Library</OutputType>
-    <Version>1.5.2</Version>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">