node-installer: detect containerd config version instead of $IS_K3S

Signed-off-by: Shiroki Satsuki <[email protected]>

Author: shirok1

node-installer/script/installer.sh

@@ -39,7 +39,7 @@ mkdir -p $NODE_ROOT$KWASM_DIR/bin/
 cp /assets/containerd-shim-spin-v2 $NODE_ROOT$KWASM_DIR/bin/
 
 if ! grep -q spin $NODE_ROOT$CONTAINERD_CONF; then
-    if $IS_K3S; then
+    if grep -q "version = 3" $NODE_ROOT$CONTAINERD_CONF; then
         echo '
 [plugins."io.containerd.cri.v1.runtime".containerd.runtimes."spin"]
     runtime_type = "'$KWASM_DIR'/bin/containerd-shim-spin-v2"