Prepare for 12.1.0 (#3590)

Co-authored-by: nirinchev <nirinchev@users.noreply.github.com>

Author: fealebenpae

CHANGELOG.md

@@ -1,4 +1,4 @@
-## vNext (TBD)
+## 12.1.0 (2024-05-01)
 
 ### Enhancements
 * Added an experimental API to update the base url for an application at runtime - `App.UpdateBaseUriAsync()`. This intended to be used for roaming between edge server and cloud. (Issue [#3521](https://github.com/realm/realm-dotnet/issues/3521))

Realm/AssemblyInfo.props

@@ -1,7 +1,7 @@
 <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
     <Product Condition="'$(Product)' == ''">Realm .NET</Product>
-    <VersionPrefix>12.0.0</VersionPrefix>
+    <VersionPrefix>12.1.0</VersionPrefix>
     <Description Condition="'$(Description)' == ''">Realm is a mobile database: a replacement for SQLite</Description>
     <Company>Realm Inc.</Company>
     <Copyright>Copyright © $([System.DateTime]::Now.ToString(yyyy)) Realm Inc.</Copyright>

Realm/Realm.Unity/package.json

@@ -1,6 +1,6 @@
 {
   "name": "io.realm.unity",
-  "version": "12.0.0",
+  "version": "12.1.0",
   "displayName": "Realm",
   "description": "Realm is an embedded, object-oriented database that lets you build real-time, always-on applications. With Realm, data is directly exposed as objects and queryable by code, removing the need for ORM's riddled with performance & maintenance issues. Additionally, objects and collections in Realm are always live, meaning that they always reflect the latest data stored in the database. You can subscribe to changes, letting you keep your UI consistently up to date.\nThe .NET Realm SDK also provide access to Atlas App Services, a secure backend that can sync data between devices, authenticate and manage users, and run serverless JavaScript functions.",
   "unity": "2021.1",