Update symreader branding to 2.2.1 (#373)

* Update symreader branding to 2.2.1

.NET 11 => 3.0.0
.NET 10 (10.0.1) => 2.2.1

* Update badge

Author: ViktorHofer

README.md

@@ -8,4 +8,4 @@ It is recommended that new applications and libraries read Portable PDBs directl
 
 Pre-release builds are available from Azure DevOps public feed: `https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools/nuget/v3/index.json` ([browse](https://dev.azure.com/dnceng/public/_packaging?_a=feed&feed=dotnet-tools)).
 
-[![Build Status](https://dnceng.visualstudio.com/public/_apis/build/status/dotnet/symreader/SymReader%20PR?branchName=main)](https://dnceng.visualstudio.com/public/_build/latest?definitionId=291&branchName=main)
+[![Build Status](https://dev.azure.com/dnceng-public/public/_apis/build/status%2Fdotnet%2Fsymreader%2FSymReader%20PR?branchName=main)](https://dev.azure.com/dnceng-public/public/_build/latest?definitionId=39&branchName=main)

eng/Versions.props

@@ -3,8 +3,7 @@
   <Import Project="Version.Details.props" />
 
   <PropertyGroup>
-    <!-- This repo version -->
-    <VersionPrefix>2.2.0</VersionPrefix>
+    <VersionPrefix>2.2.1</VersionPrefix>
     <PreReleaseVersionLabel>beta</PreReleaseVersionLabel>
     <!-- Opt-in/out repo features -->
     <UsingToolPdbConverter>false</UsingToolPdbConverter>