Update packages/docs-gesture-handler/docs/fundamentals/gesture-detector.mdx

Co-authored-by: Jakub Piasecki <jakub.piasecki@swmansion.com>

Author: m-bert

packages/docs-gesture-handler/docs/fundamentals/gesture-detector.mdx

@@ -18,7 +18,7 @@ When using hook API, you can also integrate it directly with the [Animated API](
 
 ####  Nesting Gesture Detectors
 
-Because `GestureDetector` supports both the hook API and the builder pattern, it is important to avoid nesting detectors that use different APIs, as this can result in unexpected behavior.
+Because `GestureDetector` supports both the hook API and the builder pattern, it is important to avoid nesting detectors that use different APIs, as this can result in undefined behavior.
 
 #### Reusing Gestures
 Using the same instance of a gesture across multiple Gesture Detectors may result in unexpected behavior.