docs: Update comparison.mdx - fix Caprover features

[codedoga]

This PR should improve comparison of Dokploy with Caprover:

• Gitlab/Bitbucket integration source
• Backup source
• Volume Backups via Offen one-click app

[Siumauricio]

The integration of gitlab and bitbucket is something totally different from the way dokploy and caprover are integrated,

Dokploy offers something dedicated that offers you autocompletion of repositories and branches, using oauth apps.

Instead caprover does authentication via ssh which is a manual process for each repository, i.e. this method in dokploy is known as git provider which we also support, so they are 2 different things.

The backups, if I see that recently I will add it✅

Volume backups are something different, dokploy has a dedicated interface for that, but using a template is not the same as using something dedicated that uses the software itself.

[codedoga]

The integration of gitlab and bitbucket is something totally different from the way dokploy and caprover are integrated,

Dokploy offers something dedicated that offers you autocompletion of repositories and branches, using oauth apps.

Instead caprover does authentication via ssh which is a manual process for each repository, i.e. this method in dokploy is known as git provider which we also support, so they are 2 different things.

In that case you need asterisk symbol next to all of those "integrations" to explain what was meant to be said. Otherwise it's very misleading and for someone without prior experience with Coolify, Dokku or Caprover it looks like there is no built-in way of deploying from those VCSs.