Fix prerequisites doc page for content is partly occluded by navigator (backport #4795)

[mergify]

Type of change

• Bug fix

Description

The change is intended to fix #4745 that the prerequisites page's content is partly occluded by navigator. As analyzed in the discussion of the issue, embedded div elements cause the issue. Therefore the change is going to remove all <div> elements

Additional details

Related issues

#4745

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This is an automatic backport of pull request #4795 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of 22aaf34 has failed:

On branch mergify/bp/release-2.5/pr-4795
Your branch is up to date with 'origin/release-2.5'.

You are currently cherry-picking commit 22aaf3468.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   docs/source/prereqs.md

no changes added to commit (use "git add" and/or "git commit -a")

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