upgrade to Gradle 9.1.0

Author: Haehnchen

gradle.properties

@@ -25,7 +25,7 @@ platformBundledPlugins = com.intellij.java,com.jetbrains.plugins.webDeployment,o
 javaVersion = 21
 
 # Gradle Releases -> https://github.com/gradle/gradle/releases
-gradleVersion = 8.13
+gradleVersion = 9.1.0
 
 # Opt-out flag for bundling Kotlin standard library.
 # See https://plugins.jetbrains.com/docs/intellij/kotlin.html#kotlin-standard-library for details.

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 #Wed Jul 02 16:59:32 CEST 2025
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.13-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.1.0-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists