Update Gradle Wrapper manually as its not handled by zproject #141

Job	Run time
build (ubuntu-20.04, default, enabled, clang-format-11, automake autoconf clang-format-11 git uui...	3m 59s
build (ubuntu-20.04, default, disabled, clang-format-11, automake autoconf clang-format-11 git uu...	3m 3s
build (ubuntu-20.04, valgrind, enabled, automake autoconf valgrind git uuid-dev libsystemd-dev li...	2m 50s
build (ubuntu-20.04, cmake, enabled, cmake git uuid-dev libsystemd-dev liblz4-dev libnss3-dev lib...	1m 40s
build (macos-latest, default, automake autoconf libtool ossp-uuid zeromq curl libmicrohttpd, ena...	3m 7s
build (macos-latest, default, disabled, automake autoconf libtool ossp-uuid zeromq curl libmicro...	3m 1s
build (ubuntu-20.04, cmake, 1, clang-format-11, cmake clang-format-11 git uuid-dev libsystemd-dev...	44s
build (ubuntu-20.04, abi-compliance-checker, universal-ctags abi-dumper abi-compliance-checker gi...	1m 10s
build (ubuntu-20.04, check_zproject, git uuid-dev libsystemd-dev liblz4-dev libnss3-dev libzmq3-d...	44s
	20m 18s

Provide feedback