[flutter_local_notifications] Fix typo for README (MaikuB#2387)

* fix typo for flutter local notifications README

* update README

flutter_local_notifications/README.md

@@ -204,7 +204,7 @@ dependencies {
 }
 ```
 
-Note that the plugin uses Android Gradle plugin (AGP) 7.3.1 to leverage this functionality so to errr on the safe side, applications should aim to use the same version at a **minimum**. Using a higher version is also needed as at point, Android Studio bundled a newer version of the Java SDK that will only work with Gradle 7.3 or higher (see [here](https://docs.flutter.dev/release/breaking-changes/android-java-gradle-migration-guide) for more details). For a Flutter app usin the legacy `apply` script syntax, this is specified in `android/build.gradle` and the main parts would look similar to the following
+Note that the plugin uses Android Gradle plugin (AGP) 7.3.1 to leverage this functionality so to err on the safe side, applications should aim to use the same version at a **minimum**. Using a higher version is also needed as at point, Android Studio bundled a newer version of the Java SDK that will only work with Gradle 7.3 or higher (see [here](https://docs.flutter.dev/release/breaking-changes/android-java-gradle-migration-guide) for more details). For a Flutter app usin the legacy `apply` script syntax, this is specified in `android/build.gradle` and the main parts would look similar to the following
 
 ```gradle
 buildscript {