update ov to 0810 build

[dtrawins]

🛠 Summary

🧪 Checklist

• Unit tests added.
• The documentation updated.
• Change follows security best practices.
  ``

[Copilot]

Pull request overview

Updates the OpenVINO / OpenVINO GenAI dependency pins to the 2026-08-10 nightly build across the repo’s shared version manifest and the demo model-export Python environment, keeping source SHAs and binary package URLs aligned to the same refresh.

Changes:

• Bumped OpenVINO, OpenVINO Tokenizers, and OpenVINO GenAI source commit pins in versions.mk.
• Updated GenAI nightly binary package URLs in versions.mk from dev20260730 to dev20260810.
• Updated Python export-models requirements to use openvino==2026.4.0.dev20260810 and openvino-tokenizers==2026.4.0.dev20260810.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
versions.mk	Advances OpenVINO/Tokenizers/GenAI source SHAs and GenAI nightly package URLs to the 2026-08-10 build.
demos/common/export_models/requirements.txt	Pins demo export dependencies to the matching 2026-08-10 OpenVINO nightly wheels.

---

💡 Add a code-review agent skill or configure MCP servers for context-aware, tailored reviews. Learn more in the docs.

[mzegla]

Don't we need update in export models requirements?

[dtrawins]

@mzegla it will be a separate PR because CI is failing in model export - to be investigated