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-2-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionSha256Sum=85719317abd2112f021d4f41f09ec370534ba288432065f4b477b6a3b652910d
+distributionSha256Sum=70064984b10888c84976869c6e61f525a1fb2492adc6cb11fee4894987b3902d