Add pony program example to release notes

.release-notes/4303.md

@@ -2,3 +2,13 @@
 
 We now ship a "standalone" version of libponyc for MacOS. libponyc-standalone allows applications to use Pony compiler functionality as a library. The standalone version contains "all dependencies" needed in a single library. On MacOS, sadly "all dependencies" means "all that can be statically linked", so unlike Linux, dynamically linking to C++ standard library is required on MacOS.
 
+An example pony program linking against it would need to look like this:
+
+```pony
+use "lib:ponyc-standalone" if posix or osx
+use "lib:c++" if osx
+
+actor Main
+  new create(env: Env) =>
+    None
+```