Incorrect link in GitHub About section

[SimonAllen0901]

I noticed that the link in the GitHub About section is outdated. Currently, it points to https://videojs-vr.netlify.com, which does not redirect properly to the correct URL, https://videojs-vr.netlify.app.

Since Netlify updated its default site URLs in 2020 from .com to .app, it would be great to update the About section link to avoid confusion for users.

For reference, please also see the related PR I submitted: #290.