chore(deps): bump realm-gradle-plugin from 5.14.0 to 5.15.1

Bumps [realm-gradle-plugin](https://github.com/realm/realm-java) from 5.14.0 to 5.15.1.
- [Release notes](https://github.com/realm/realm-java/releases)
- [Changelog](https://github.com/realm/realm-java/blob/master/CHANGELOG.md)
- [Commits](realm/realm-java@v5.14.0...v5.15.1)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

build.gradle

@@ -9,7 +9,7 @@ buildscript {
         classpath "com.android.tools.build:gradle:3.5.0"
         classpath "com.jfrog.bintray.gradle:gradle-bintray-plugin:1.8.4"
         classpath "com.github.dcendents:android-maven-gradle-plugin:2.1"
-        classpath "io.realm:realm-gradle-plugin:5.14.0"
+        classpath "io.realm:realm-gradle-plugin:5.15.1"
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.3.50"
 
         // NOTE: Do not place your application dependencies here; they belong