Use direct links to training center

[ariostas]

This PR changes the links to the training center so that they point directly there instead of getting there through a series of redirections. The Plausible Analytics for the training center says that most people are getting there with a direct link, but I suspect that the reason for this is that the redirections are obscuring the real sources. So we will see if after making this change we see that most people are really coming from the HSF website.

[netlify]

✅ Deploy Preview for earnest-hotteok-b1e1bf ready!

Name	Link
🔨 Latest commit	40ce0cc
🔍 Latest deploy log	https://app.netlify.com/sites/earnest-hotteok-b1e1bf/deploys/6806960e713100000864b230
😎 Deploy Preview	https://deploy-preview-1728--earnest-hotteok-b1e1bf.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[ariostas]

I fixed a link that was broken, but the other two broken links reported by the Check Markdown links workflow are false positives. They probably just rate-limited GitHub's servers.

[ariostas]

@michmx I can't request a reviewer, but could you take a look at this when you get a chance?

[michmx]

I fixed a link that was broken, but the other two broken links reported by the Check Markdown links workflow are false positives. They probably just rate-limited GitHub's servers.

For the record

ERROR: 2 dead links found!
[✖] https://mattermost.com/ → Status: 403
[✖] https://demo.codimd.org/ → Status: 403

Both links active with pages up and running.

[michmx]

Thanks for the fixes!