Upgrade gradle wrapper to 7.5.1

Author: tgeens

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 #Wed Feb 17 01:23:38 CET 2021
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.8.2-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.5.1-all.zip
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStorePath=wrapper/dists