3.0 final is live. Change the docs version

Author: andrus

RELEASE-NOTES.md

@@ -2,7 +2,7 @@
 
 * #4 Upgrade Testcontainers to 2.0.3
 
-## 3.0-RC2
+## 3.0
 
 * #3 Bump org.apache.commons:commons-lang3 from 3.17.0 to 3.18.0