Update README.md

Author: andrehtissot

README.md

@@ -48,7 +48,7 @@ Make sure you have ‘google-services.json’ for Android or ‘GoogleService-In
 |Preference|Default Value|Description|
 |---|---|---|
 |ANDROID_DEFAULT_NOTIFICATION_ICON|@mipmap/ic_launcher|Default notification icon.|
-|ANDROID_FCM_VERSION|21.0.0|Native Firebase Message SDK version :warning: Replaced by BoM versioning on Gradle >= 3.4.|
+|ANDROID_FCM_VERSION|21.0.0|Native Firebase Message SDK version.<br>:warning: Replaced by BoM versioning on Gradle >= 3.4.|
 |ANDROID_FIREBASE_BOM_VERSION|26.0.0|[Firebase BoM](https://firebase.google.com/docs/android/learn-more#bom) version.|
 |ANDROID_GOOGLE_SERVICES_VERSION|4.3.4|Native Google Services SDK version.|
 |ANDROID_GRADLE_TOOLS_VERSION|4.1.0|Gradle tools version.|