Update README.md

[shasibhusanJena]

Added new link's to Java Section

Description

Added some useful links to the "Java" section in the readme.md section

Motivation and Context

• reference to a links where DB operations are included in the process.
• reference to a link on how to create a sample form and submit

How Has This Been Tested?

• Tested in the forked -Local Env and by clicking on the links provided

Types of changes

• [ x] Documentation change

Checklist:

• [ x] My code follows the code style of this project.
• [ x] I have updated the documentation accordingly.
• [ x] I have read the CONTRIBUTING document.
• [ x] I have made checks to ensure URLs and other resources are valid