Updated mono-ngx (#4358)

frameworks/CSharp/aspnet-mono-ngx/aspnet-mono-ngx-jn.dockerfile

@@ -1,4 +1,4 @@
-FROM mono:5.10.0.160
+FROM mono:latest
 RUN apt update -yqq && apt install -yqq nginx wget mono-fastcgi-server
 
 WORKDIR /aspnet

frameworks/CSharp/aspnet-mono-ngx/aspnet-mono-ngx-my-ef.dockerfile

@@ -1,4 +1,4 @@
-FROM mono:5.10.0.160
+FROM mono:latest
 RUN apt update -yqq && apt install -yqq nginx wget mono-fastcgi-server
 
 WORKDIR /aspnet

frameworks/CSharp/aspnet-mono-ngx/aspnet-mono-ngx-my.dockerfile

@@ -1,4 +1,4 @@
-FROM mono:5.10.0.160
+FROM mono:latest
 RUN apt update -yqq && apt install -yqq nginx wget mono-fastcgi-server
 
 WORKDIR /aspnet

frameworks/CSharp/aspnet-mono-ngx/aspnet-mono-ngx-ss.dockerfile

@@ -1,4 +1,4 @@
-FROM mono:5.10.0.160
+FROM mono:latest
 RUN apt update -yqq && apt install -yqq nginx wget mono-fastcgi-server
 
 WORKDIR /aspnet

frameworks/CSharp/aspnet-mono-ngx/aspnet-mono-ngx.dockerfile

@@ -1,4 +1,4 @@
-FROM mono:5.10.0.160
+FROM mono:latest
 RUN apt update -yqq && apt install -yqq nginx wget mono-fastcgi-server
 
 WORKDIR /aspnet