update njs version to 0.8.9

Signed-off-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: Zoey2936

Dockerfile

@@ -15,7 +15,7 @@ ARG RCP_VER=1.27.1
 ARG NB_VER=master
 ARG NF_VER=master
 ARG HMNM_VER=v0.37
-ARG NJS_VER=0.8.8
+ARG NJS_VER=0.8.9
 ARG NDK_VER=v0.3.3
 ARG LNM_VER=v0.10.27
 ARG MODSECNGX_VER=v1.0.3