Merge pull request #9267 from sbueringer/pr-bump-conv-gen

🌱 Bump conversion-gen to v0.28

Author: k8s-ci-robot

Makefile

@@ -122,7 +122,7 @@ GOTESTSUM_BIN := gotestsum
 GOTESTSUM := $(abspath $(TOOLS_BIN_DIR)/$(GOTESTSUM_BIN)-$(GOTESTSUM_VER))
 GOTESTSUM_PKG := gotest.tools/gotestsum
 
-CONVERSION_GEN_VER := v0.27.1
+CONVERSION_GEN_VER := v0.28.0
 CONVERSION_GEN_BIN := conversion-gen
 # We are intentionally using the binary without version suffix, to avoid the version
 # in generated files.