fix(build): normalize html path

[btea]

Description

fix #15527

Additional context

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

Before submitting the PR, please make sure you do the following

• Read the Contributing Guidelines, especially the Pull Request Guidelines.
• Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
• Update the corresponding documentation if needed.
• Ideally, include relevant tests that fail without this PR but pass with it.

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[patak-dev]

Would you add a test case for this one?

[btea]

Would you add a test case for this one?

I will give it a try.

[patak-dev]

Note: The normalized id is used in other places now, but I think that it is safer to use it everywhere and not only for the line that fixed the linked issue.