Revert "[chore] Release 3.0.0 (#397)" (#398)

This reverts commit 856d46a.

Author: jonathanedey

FirebaseAdmin/FirebaseAdmin/FirebaseAdmin.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <Version>3.0.0</Version>
+    <Version>2.4.1</Version>
     <TargetFrameworks>netstandard2.0;net462;net6.0</TargetFrameworks>
     <LangVersion>latest</LangVersion>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>