Fixed version number

Author: rabanti-github

Demo .NET Standard/Demo .NET Standard.csproj

@@ -9,7 +9,7 @@
     <RepositoryUrl>https://github.com/rabanti-github/PicoXLSX.git</RepositoryUrl>
     <PackageProjectUrl>https://github.com/rabanti-github/PicoXLSX</PackageProjectUrl>
     <AssemblyVersion>3.2.1.0</AssemblyVersion>
-    <FileVersion>3.2.0.0</FileVersion>
+    <FileVersion>3.2.1.0</FileVersion>
     <Version>3.2.1</Version>
     <Description>Demo Library showing the use of PicoXLSX, a library to generate Microsoft Excel files (XLSX) in an easy and native way</Description>
     <StartupObject>Demo.Program</StartupObject>