install/kubernetes: add the cilium/values.yaml target to .PHONY

This target should completely ignore the existing contents of
`cilium/values.yaml` since we always generate from the template files.

Co-authored-by: Donia Chaiehloudj <donia.cld@isovalent.com>
Signed-off-by: Nicolas Busseneau <nicolas@isovalent.com>

install/kubernetes/Makefile

@@ -75,4 +75,4 @@ docs:
 check-docker-images: # Check whether docker images are available for the current version.
 	$(QUIET)$(ROOT_DIR)/contrib/release/check-docker-images.sh "$(CILIUM_VERSION)"
 
-.PHONY: all check-docker-images check-values-yaml clean docs lint update-chart update-versions
+.PHONY: all check-docker-images check-values-yaml cilium/values.yaml clean docs lint update-chart update-versions