Update the Flexible Classroom docs for v2.8.10, v2.8.11, and v2.8.12

[billy-the-fish]

Business case: Enable developers to use the latest features for Flexible Classroom

Subject Matter Expert:

• Technical:
• Language: Iain
• PM: Kyle

Scope: Please update the docs in milestone44-flexible-classroom-2.8.0 with the following:

• Add to release notes - release_notes_2.8.10_2.8.12.md
• EduStore API ref: Edu_Store_v2.8.10.zip
• Links to Demos and samples:
  • Android:
    • Demo: http://10.80.1.174:8090/agora_ad/cloudclass/android/release_2.8.11/Agora_Flexible_for_Android_release_2.8.11_20230112_1405_prod_2738.apk
    • Sample code: https://github.com/AgoraIO-Community/CloudClass-Android/tree/release/2.8.11
  • Web and Electron:
    • Electron for windows demo: https://download.agora.io/edu-apaas/release/Agora_aPaas_Flexible_for_Windows_release_2.8.12_20230206_1530_prod_2836.zip
    • Electron for macOS demo: https://download.agora.io/edu-apaas/release/Agora_aPaas_Flexible_for_MAC_release_2.8.12_20230206_1500_prod_5093.zip
    • Web demo: https://solutions-apaas.agora.io/apaas/app/prod/release_2.8.12/20230206_5094/index.html
    • Web h5 demo: https://solutions-apaas.agora.io/apaas/app/prod/release_2.8.12/20230206_5094/index.html#/h5/join-room
    • Web/Electron sample code: https://github.com/AgoraIO-Community/flexible-classroom-desktop/tree/release/2.8.12 iOS:
    • demo: no need to update
    • sample code: https://github.com/AgoraIO-Community/flexible-classroom-ios/tree/release/2.8.11

Acceptance criteria: Docs are technically correct and follow the Google Developer Style Guide.

Additional valuable information: All branches must be made from and merged to: https://github.com/AgoraIO/Docs-Source/tree/milestone44-flexible-classroom-2.8.0

[atovpeko]

@billy-the-fish http://10.80.1.174:8090/agora_ad/cloudclass/android/release_2.8.11/Agora_Flexible_for_Android_release_2.8.11_20230112_1405_prod_2738.apk neither looks correct, nor works. I followed the previous link format and changed it to https://download.agora.io/edu-apaas/release/Agora_Flexible_for_Android_release_2.8.11_20230112_1405_prod_2738.apk which does work