k8s: Fix mismatching names in Rancher CLI downloader

Issue-ID: SECCOM-235
Change-Id: Iab0086634bcfaba772852352c72e03a3d6833801
Signed-off-by: Pawel Wieczorek <p.wieczorek2@samsung.com>
diff --git a/test/security/k8s/tools/casablanca/get_ranchercli.sh b/test/security/k8s/tools/casablanca/get_ranchercli.sh
index a5295fb..76d5594 100755
--- a/test/security/k8s/tools/casablanca/get_ranchercli.sh
+++ b/test/security/k8s/tools/casablanca/get_ranchercli.sh
@@ -10,7 +10,7 @@
 ARCH="${2:-$DEFAULT_ARCH}"
 SYSTEM="${3:-$DEFAULT_SYSTEM}"
 
-ARCHIVE="rancher-${SYSTEM}-${ARCHITECTURE}-${VERSION}.tar.gz"
+ARCHIVE="rancher-${SYSTEM}-${ARCH}-${VERSION}.tar.gz"
 DIRECTORY="rancher-${VERSION}"
 URL="https://releases.rancher.com/cli/${VERSION}/${ARCHIVE}"