Merge pull request #14572 from rook/mergify/bp/release-1.15/pr-14565

ci: fix failing multus validation tool test (backport #14565)

.github/workflows/multus.yaml

@@ -11,6 +11,7 @@ on:
       - cmd/rook/userfacing/**
       - pkg/daemon/multus/**
       - .github/workflows/multus.yaml
+      - tests/scripts/multus/**
 
 defaults:
   run:

tests/scripts/multus/host-cfg-ds.yaml

@@ -29,12 +29,12 @@ spec:
       terminationGracePeriodSeconds: 0 # allow updating/deleting immediately
       containers:
         - name: test
-          image: quay.io/ceph/ceph:v18
+          image: jonlabelle/network-tools
           env:
             - name: IFACE_NAME
               value: eth0 # IFACE_NAME
           command:
-            - bash
+            - sh
             - -x
             - -c
           args: