Docs: Link to Java driver tutorial (#582)

* Docs: Link to Java driver tutorial

* Update README.md

---------

Co-authored-by: Michele Rastelli <[email protected]>

Author: Simran-B

Diff for: README.md

@@ -11,6 +11,5 @@ The official [ArangoDB](https://www.arangodb.com/) Java Driver.
 
 - [ChangeLog](ChangeLog.md)
 - [Examples](test-non-functional/src/test/java/example)
-- [Tutorial](https://university.arangodb.com/courses/java-driver-tutorial-v7/)
-- [Documentation](https://docs.arangodb.com/stable/develop/drivers/java/)
+- [Documentation and Tutorial](https://docs.arangodb.com/stable/develop/drivers/java/)
 - [JavaDoc](https://www.javadoc.io/doc/com.arangodb/arangodb-java-driver/latest/index.html)

Diff for: tutorial/README.md

@@ -1,3 +1,4 @@
 # ArangoDB Java driver tutorial
 
-Code for ArangoDB [Java driver tutorial](https://university.arangodb.com/courses/java-driver-tutorial-v7/).
+This folder contains the code for the
+[Java driver tutorial](https://docs.arangodb.com/stable/develop/drivers/java/).