update nginx-ntlm-module version to v1.19.3-beta.1

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

Author: Zoey2936

Dockerfile

@@ -20,7 +20,7 @@ ARG HMNM_VER=v0.38
 
 ARG NJS_VER=0.9.0
 ARG VTS_VER=v0.2.4
-ARG NNTLM_VER=master
+ARG NNTLM_VER=v1.19.3-beta.1
 ARG NHG2M_VER=3.4
 
 ARG LRC_VER=v0.1.31