node-installer: fix symbolic link to path containing $NODE_ROOT

Author: shirok1

node-installer/script/installer.sh

@@ -37,7 +37,7 @@ cp /assets/containerd-shim-spin-v2 $NODE_ROOT$KWASM_DIR/bin/
 # A bug in containerd makes BinaryName not work with shim not in PATH
 # https://github.com/containerd/containerd/issues/11480
 mkdir -p $NODE_ROOT/usr/local/bin/
-ln -s $NODE_ROOT$KWASM_DIR/bin/containerd-shim-spin-v2 $NODE_ROOT/usr/local/bin/containerd-shim-spin
+ln -s $KWASM_DIR/bin/containerd-shim-spin-v2 $NODE_ROOT/usr/local/bin/containerd-shim-spin
 
 # K3S and RKE2 can detect spin shim themselves, no need to configure
 # https://github.com/k3s-io/k3s/pull/9519