[GLOBAL] Fix Makefile typo

One of Makefile action is to copy `helm` directory into `packages` one.
Change done in order to choose helm binary accidentally made this
behavior to work _only_ if helm binary is `helm`.
This patch set it back to previous behaviour for this particular
command.

Issue-ID: OOM-2562
Signed-off-by: Sylvain Desbureaux <sylvain.desbureaux@orange.com>
Change-Id: I22c52d538f9f396bd4028b6e0f0adcecb8e8df61
diff --git a/kubernetes/Makefile b/kubernetes/Makefile
index 81d35c5..3c5254c 100644
--- a/kubernetes/Makefile
+++ b/kubernetes/Makefile
@@ -85,7 +85,7 @@
 
 # publish helm plugins via distrubtion directory
 plugins:
-	@cp -R $(HELM_BIN) $(PACKAGE_DIR)/
+	@cp -R helm $(PACKAGE_DIR)/
 
 # start up a local helm repo to serve up helm chart packages
 # WARNING: Only helm < v3 supported