Updating the create external Language script

Author: amvin87-zz

docs/linux/sql-server-linux-setup-language-extensions.md

@@ -194,9 +194,13 @@ The following example adds an external language called Java to a database on SQL
 
 ```SQL
 CREATE EXTERNAL LANGUAGE Java
-FROM (CONTENT = N'<path-to-tar.gz>', FILE_NAME = 'javaextension.so');
-GO
+FROM (CONTENT = N'/opt/mssql-extensibility/lib/java-lang-extension.tar.gz', 
+    FILE_NAME = 'javaextension.so', 
+    ENVIRONMENT_VARIABLES = N'{"JRE_HOME":"/opt/mssql/lib/zulu-jre-11"}')
 ```
+For the Java extension, the environment variable “JRE_HOME” is used to determine the path to find and initialize the JVM from.
+
+CREATE EXTERNAL LANGUAGE ddl provides a parameter (ENVIRONMENT_VARIABLES) to set environment variables specifically for the process hosting the extension. This is the recommended and most effective way to set environment variables required by external language extensions.
 
 For more information, see [CREATE EXTERNAL LANGUAGE](https://docs.microsoft.com/sql/t-sql/statements/create-external-language-transact-sql).