Auto-update dependencies. (#419)

Brought to you by your friendly [Repository Gardener](https://togithub.com/GoogleCloudPlatform/repository-gardener).

Author: dpebot

admob/app/build.gradle

@@ -26,12 +26,12 @@ dependencies {
     implementation 'androidx.legacy:legacy-support-v4:1.0.0'
     implementation 'androidx.browser:browser:1.0.0'
     implementation 'androidx.appcompat:appcompat:1.6.0'
-    implementation "com.google.firebase:firebase-ads:21.4.0"
+    implementation "com.google.firebase:firebase-ads:21.5.0"
     implementation "androidx.constraintlayout:constraintlayout:2.1.4"
     implementation "androidx.multidex:multidex:2.0.1"
 
     // [START gradle_play_config]
-    implementation 'com.google.android.gms:play-services-ads:21.4.0'
+    implementation 'com.google.android.gms:play-services-ads:21.5.0'
     // [END gradle_play_config]
 
     // For an optimal experience using AdMob, add the Firebase SDK