Promote 19.0.1-beta1 to stable release (#521)

Author: adamreeve

csharp/ParquetSharp.csproj

@@ -12,7 +12,7 @@
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <NoWarn>1591;</NoWarn>
-    <VersionPrefix>19.0.1-beta1</VersionPrefix>
+    <VersionPrefix>19.0.1</VersionPrefix>
     <Company>G-Research</Company>
     <Authors>G-Research</Authors>
     <Product>ParquetSharp</Product>