Add reference to sentry-spring-boot-starter

Closes gh-15205

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

@@ -139,6 +139,9 @@ do as they were designed before this was clarified.
 | https://github.com/rollbar/rollbar-java/[Rollbar]
 | https://github.com/olmero/rollbar-spring-boot-starter
 
+| https://sentry.io[Sentry]
+| https://github.com/getsentry/sentry-java/tree/master/sentry-spring-boot-starter
+
 | https://projects.spring.io/spring-batch/[Spring Batch] (Advanced usage)
 | https://github.com/codecentric/spring-boot-starter-batch-web