docs: Add cache to features [skip ci]

LukeSavefrogs · LukeSavefrogs · commit a95fb15c507d · 2024-05-18T00:46:37.000+02:00
diff --git a/README.md b/README.md
@@ -7,6 +7,7 @@ This action provides the following functionalities for GitHub Actions users:
 
 - Installing a version of Jython and adding it to `PATH`
 - Customizing the installation path
+- Cache the installed Jython binaries for faster setup
 
 ## Basic usage
 
