Install gradle 6.2 in docker image (#5541)
Install gradle 6.2 in docker image (#5541)

Co-authored-by: Rhys Arkins <bcfcf56a981f09329b467441681acc1974fbfdf3@arkins.net>
Co-authored-by: Michael Kriese <4268821fcf9942a8d7b518e9e4a3426e97a8669f@visualon.de>

singapore/renovate,singapore/renovate,singapore/renovate