Merge pull request #20830 from straumat

* pr/20830:
  Add reference to XChange starter

Closes gh-20830

Author: snicoll

spring-boot-project/spring-boot-starters/README.adoc

@@ -223,4 +223,7 @@ do as they were designed before this was clarified.
 | https://alexo.github.io/wro4j/[Wro4j]
 | https://github.com/michael-simons/wro4j-spring-boot-starter
 
+| https://github.com/knowm/XChange[XChange]
+| https://github.com/cassandre-tech/cassandre-trading-bot
+
 |===