Bump golang from 1.21.5 to 1.22.0 in /.test-defs#4

dependabot[bot] wants to merge 1 commit intomasterScheererJ/gardener:masterfrom

dependabot/docker/dot-test-defs/golang-1.22.0ScheererJ/gardener:dependabot/docker/dot-test-defs/golang-1.22.0Copy head branch name to clipboard