fixup! chore: added doc to README.md

Signed-off-by: Bernd Warmuth <[email protected]>

README.md

@@ -218,11 +218,11 @@ Once you've added a hook as a dependency, it can be registered at the global, cl
 ### Tracking
 
 The [tracking API](https://openfeature.dev/specification/sections/tracking/) allows you to use OpenFeature abstractions to associate user actions with feature flag evaluations.
-This is essential for robust experimentation powered by feature flags.
+This is essential for robust experimentation powered by feature flags. Note that, unlike methods that handle feature flag evaluations, calling `track(...)` may throw an `IllegalArgumentException` if an empty string is passed as the `trackingEventName`.
 
 ```java
 OpenFeatureAPI api = OpenFeatureAPI.getInstance();
-api.getClient().track("visited-promo-page", new MutableTrackingEventDetails(99.77).add("currency", "USD"))
+api.getClient().track("visited-promo-page", new MutableTrackingEventDetails(99.77).add("currency", "USD"));
 ```
 
 ### Logging