Update servicing version

Author: eiriktsarpalis

src/libraries/System.Text.Json/src/System.Text.Json.csproj

@@ -8,7 +8,8 @@
     <NoWarn>CS8969</NoWarn>
     <IncludeInternalObsoleteAttribute>true</IncludeInternalObsoleteAttribute>
     <IsPackable>true</IsPackable>
-    <ServicingVersion>1</ServicingVersion>
+    <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
+    <ServicingVersion>2</ServicingVersion>
     <!-- This library has been annotated to be AOT safe -->
     <EnableAOTAnalyzer>true</EnableAOTAnalyzer>
     <PackageDescription>Provides high-performance and low-allocating types that serialize objects to JavaScript Object Notation (JSON) text and deserialize JSON text to objects, with UTF-8 support built-in. Also provides types to read and write JSON text encoded as UTF-8, and to create an in-memory document object model (DOM), that is read-only, for random access of the JSON elements within a structured view of the data.