Revert "increase Gradle JVM heap size to 32G"

This reverts commit 378ae5b.

Author: AndreiKingsley

gradle.properties

@@ -2,7 +2,7 @@ projectName=dataframe
 version=1.0.0
 jupyterApiTCRepo=
 kotlin.jupyter.add.scanner=false
-org.gradle.jvmargs=-Xmx32G -Duser.language=en -Duser.country=US -Dfile.encoding=UTF-8
+org.gradle.jvmargs=-Xmx16G -Duser.language=en -Duser.country=US -Dfile.encoding=UTF-8
 
 # build.number.detection=false
 # build.number=0.8.0