JSP: fix tomcat breakage (#28)

It needs this same fix https://github.com/unicode-org/cldr/pull/793/files 

(more details at https://stackoverflow.com/questions/51258801/how-to-get-always-latest-link-to-download-tomcat-server-using-shell ) 

Moving to Maven would improve this as we would only depend on  the servlet API for build which doesn't change much, and then the OS provided server package.

Author: srl295

UnicodeJsps/Dockerfile

@@ -12,7 +12,7 @@ FROM openjdk:16-alpine AS build
 # way to manage this.
 RUN apk add --update apache-ant
 # Some version of tomcat. Just used for API, does not have to match TOMCATVERSION
-ARG TOMCAT_API=https://www.apache.org/dyn/mirrors/mirrors.cgi?action=download&filename=tomcat/tomcat-9/v9.0.37/bin/apache-tomcat-9.0.37.tar.gz
+ARG TOMCAT_API=https://www.apache.org/dyn/mirrors/mirrors.cgi?action=download&filename=tomcat/tomcat-9/v9.0.39/bin/apache-tomcat-9.0.39.tar.gz
 RUN mkdir -p /usr/local/lib && cd /usr/local/lib/ && wget "${TOMCAT_API}" -O - | tar xfpz - && ln -svf apache-tomcat-* ./tomcat
 
 WORKDIR /home