Bump gradle version

Author: jamesnrokt

core-sdk-samples/higgs-shop-sample-app/gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 #Sun Feb 13 22:22:36 PST 2022
 distributionBase=GRADLE_USER_HOME
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.5.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.7-bin.zip
 distributionPath=wrapper/dists
 zipStorePath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME