Add February 2026 release notes for Defender on Linux

[hridampalwe]

Added February 2026 release notes for Defender for Endpoint on Linux, including new features and configuration URLs.

[prmerger-automator]

@hridampalwe : Thanks for your contribution! The author(s) and reviewer(s) have been notified to review your proposed change.

[learn-build-service-prod]

Learn Build status updates of commit 6e1e1ce:

✅ Validation status: passed

File	Status	Preview URL	Details
defender-endpoint/linux-whatsnew.md	✅Succeeded

For more details, please refer to the build report.

[limwainstein]

@hridampalwe I'm currently working on a pull request with new what's new pages. I'll integrate this update as a new PR as soon as those changes are published (should be later today).

[learn-build-service-prod]

Learn Build status updates of commit 701b6a3:

✅ Validation status: passed

File	Status	Preview URL	Details
defender-endpoint/linux-whatsnew.md	✅Succeeded

For more details, please refer to the build report.

[learn-build-service-prod]

Learn Build status updates of commit 9acb995:

✅ Validation status: passed

File	Status	Preview URL	Details
defender-endpoint/linux-whatsnew.md	✅Succeeded

For more details, please refer to the build report.

[hridampalwe]

@hridampalwe I'm currently working on a pull request with new what's new pages. I'll integrate this update as a new PR as soon as those changes are published (should be later today).

@limwainstein I have merged with base again I hope it is fine now.

[limwainstein]

@hridampalwe I've just created and merged this PR: https://github.com/MicrosoftDocs/defender-docs-pr/pull/6576, adding this content into the new pages. I'm closing this PR. The new content should go live sometime today on: https://learn.microsoft.com/en-us/defender-endpoint/microsoft-defender-endpoint-releases#linux-releases