Bump CNI plugins to v1.4.0

Ref: https://github.com/rancher/plugins/compare/v1.3.0-k3s1...v1.4.0-k3s2

Signed-off-by: Brad Davidson <brad.davidson@rancher.com>
(cherry picked from commit 77ba9904d1)
Signed-off-by: Brad Davidson <brad.davidson@rancher.com>

scripts/version.sh

@@ -68,7 +68,7 @@ if [ -z "$VERSION_CRI_DOCKERD" ]; then
   VERSION_CRI_DOCKERD="v0.0.0"
 fi
 
-VERSION_CNIPLUGINS="v1.3.0-k3s1"
+VERSION_CNIPLUGINS="v1.4.0-k3s2"
 
 VERSION_KUBE_ROUTER=$(get-module-version github.com/cloudnativelabs/kube-router/v2)
 if [ -z "$VERSION_KUBE_ROUTER" ]; then