Bump firebase-auth from 20.0.4 to 21.0.1 in /android

Bumps firebase-auth from 20.0.4 to 21.0.1.

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

android/app/build.gradle

@@ -39,7 +39,7 @@ dependencies {
     implementation 'com.google.android.material:material:1.3.0'
     implementation 'androidx.constraintlayout:constraintlayout:2.1.1'
     implementation 'androidx.legacy:legacy-support-v4:1.0.0'
-    implementation 'com.google.firebase:firebase-auth:20.0.4'
+    implementation 'com.google.firebase:firebase-auth:21.0.1'
     implementation 'com.google.firebase:firebase-database:19.7.0'
     testImplementation 'junit:junit:4.+'
     androidTestImplementation 'androidx.test.ext:junit:1.1.2'