Add note about possibly outdated video

[GabLeRoux]

Adding a small note concerning video which was made with older versions of our actions. I think the video is still relevant as it's nice to see it live. Things like activation slightly changed tho.

[github-actions[bot]]

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit e42e003):

https://game-ci-5559f--pr436-possibly-outdated-vi-tqbz5ltx.web.app

_{(expires Sun, 26 Nov 2023 19:39:38 GMT)}

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