fix(): update advertising banner css style

[Tony133]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/nestjs/docs.nestjs.com/blob/master/CONTRIBUTING.md

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Docs
• Other... Please describe:

What is the current behavior?

Issue Number:

• Change the position of advertisement.  #2869
• Difficulty in navigating topics on a page #2921
• Ads cover content #2941

What is the new behavior?

Proposal:

• Update advertising banner css style

Does this PR introduce a breaking change?

• Yes
• No

Other information

Before:

After ( with fix ):

[Tony133]

Link for preview: https://deploy-preview-2922--docs-nestjs.netlify.app/techniques/database 🔥

[smith558]

I don't think this is a fix. Looking at the preview, this proposed change hides the ads until the user scrolls all the way to the bottom, making them essentially unreachable (which is obviously undesirable).

[Tony133]

@smith558 other solutions are always accepted, if you have another solution please post it here.

[smith558]

@smith558 other solutions are always accepted, if you have another solution please post it here.

Unfortunately I do not have time currently. But I am just saying. This proposed way of fix would lead to very much decreased income from the Carbon ads placed on the website because they track "impressions".