Update apache-guacamole-install.sh (#4237)

Author: michelroegl-brunner

install/apache-guacamole-install.sh

@@ -60,7 +60,7 @@ $STD ./configure --with-init-dir=/etc/init.d --enable-allow-freerdp-snapshots
 $STD make
 $STD make install
 $STD ldconfig
-RELEASE_CLIENT=$(curl -fsSL https://api.github.com/repos/apache/guacamole-client/tags | jq -r '.[0].name')
+RELEASE_CLIENT=$(curl -fsSL https://api.github.com/repos/apache/guacamole-client/tags | jq -r '.[].name' | grep -v -- '-RC' | head -n 1)
 curl -fsSL "https://downloads.apache.org/guacamole/${RELEASE_CLIENT}/binary/guacamole-${RELEASE_CLIENT}.war" -o "/opt/apache-guacamole/tomcat9/webapps/guacamole.war"
 cd /root
 curl -fsSL "https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-8.0.26.tar.gz" -o "/root/mysql-connector-java-8.0.26.tar.gz"