Merge pull request #10535 from nextcloud/dependabot/gradle/io.gitlab.arturbosch.detekt-detekt-gradle-plugin-1.21.0

Bump detekt-gradle-plugin from 1.20.0 to 1.21.0

app/build.gradle

@@ -7,7 +7,7 @@ buildscript {
         classpath 'com.hiya:jacoco-android:0.2'
         classpath 'com.github.spotbugs.snom:spotbugs-gradle-plugin:5.0.9'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
-        classpath "io.gitlab.arturbosch.detekt:detekt-gradle-plugin:1.20.0"
+        classpath "io.gitlab.arturbosch.detekt:detekt-gradle-plugin:1.21.0"
         classpath "commons-httpclient:commons-httpclient:3.1@jar" // remove after entire switch to lib v2
         classpath 'com.karumi:shot:5.14.1'
         classpath "org.jacoco:org.jacoco.core:$jacoco_version"