docs: add compatibility with app3

Author: kavishdevar

README.md

@@ -18,8 +18,11 @@ LibrePods unlocks Apple's exclusive AirPods features on non-Apple devices. Get a
 | Status | Device | Features |
 |--------|--------|----------|
 | ✅ | AirPods Pro (2nd Gen) | Fully supported and tested |
+| ✅ | AirPods Pro (3rd Gen) | Fully supported* |
 | ⚠️ | Other AirPods models | Basic features (battery status, ear detection) should work |
 
+*\*Except HRM*
+
 Most features should work with any AirPods. Currently, testing is only performed with AirPods Pro 2.
 
 ## Key Features