[docs] Update compatibility table (#4161)

## Description

Compatibility table after beta.4

## Test plan

Read docs 🤓

Author: m-bert

packages/react-native-gesture-handler/compatibility.json

@@ -1,4 +1,7 @@
 {
+  "3.0.0-beta.4": {
+    "react-native": ["0.81", "0.82", "0.83", "0.84", "0.85"]
+  },
   "3.0.0-beta.3": {
     "react-native": ["0.81", "0.82", "0.83", "0.84", "0.85"]
   },