Fix.

README.md

@@ -1,7 +1,7 @@
 # Wise Environment.
 
 ![Apache 2](https://img.shields.io/hexpm/l/plug.svg)
-![Java 11](https://img.shields.io/badge/Java-11-blue.svg)
+![Java 17](https://img.shields.io/badge/Java-17-blue.svg)
 ![Maven Central](https://badgen.net/maven/v/maven-central/com.transferwise.common/wise-environment)
 [![Owners](https://img.shields.io/badge/team-AppEng-blueviolet.svg?logo=wise)](https://transferwise.atlassian.net/wiki/spaces/EKB/pages/2520812116/Application+Engineering+Team) [![Slack](https://img.shields.io/badge/slack-sre--guild-blue.svg?logo=slack)](https://app.slack.com/client/T026FB76G/CLR1U8SNS)
 > Use the `@application-engineering-on-call` handle on Slack for help.