Update to Gradle 8.7

Signed-off-by: Andriy Redko <andriy.redko@aiven.io>

Author: reta

gradle/wrapper/gradle-wrapper.properties

@@ -11,7 +11,7 @@
 
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.6-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.7-rc-3-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionSha256Sum=85719317abd2112f021d4f41f09ec370534ba288432065f4b477b6a3b652910d
+distributionSha256Sum=111a97b26c931855c3160ab6a6e8e7a5f1ae7010b0dbde42712defa4c929b311