Update Release_notes.md

[SaikrishnaBairamoni]

PR Details

This PR updates release notes with new PRs changes made for 2026-q2

Description

Related GitHub Issue

Related Jira Key

Motivation and Context

How Has This Been Tested?

Types of changes

• Defect fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that cause existing functionality to change)

Checklist:

• I have added any new packages to the sonar-scanner.properties file
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.