Update README

README.md

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 # Docker teamcity-agent with multi .NET SDKs
 
-Customized Teamcity Agent image Ubuntu 20.04, add more tooks and .NET SDK
+Customized Teamcity Agent image Ubuntu 20.04 (Focal Fossa), add more tooks and .NET SDK
 
 ## Docker Hub and Dockerfile
 
@@ -13,12 +13,11 @@ https://hub.docker.com/r/teslaconsulting/teamcity-agent
 Update per build.
 
 - Latest tag: `2022.04.4-linux`
-- .NET 6 SDK: 6.0.401
-- .NET 6 and ASP.NETCore 6: 6.0.9
+- .NET 8 SDK: 8.0.100-preview.6.23330.14
+- .NET 7 SDK: 7.0.306
+- .NET 6 SDK: 6.0.412
 - .NET 5 SDK: 5.0.408
-- .NET 5 and ASP.NETCore 5: 5.0.17
-- .NETCore 3.1 SDK: 3.1.423
-- .NET 3.1 and ASP.NETCore 3.1: 3.1.29
-- Powershell Core: 7.2.6
-- MinVer Cli: 4.2.0
-- Docker Compose v2: 2.11.2
+- .NETCore 3.1 SDK: 3.1.426
+- Powershell Core: 7.4.0-preview.3
+- MinVer Cli: 4.3.0
+- Docker Compose v2: 2.20.0