Fixed bug for bold titles in header

[conradkun]

What problem does this PR solve?

The header page titles (top right) are supposed to be bold when we are at that page. For example, "Posts" is supposed to be bold when we are in www.domain/posts, and it currently is not. A couple of typos are the cause.

Is this PR adding a new feature?

No.

Is this PR related to any issue or discussion?

Not reported as far as I am concerned.

PR Checklist

• [ x] I have verified that the code works as described/as intended.
• [ x] This change adds a social icon which has a permissive license to use it.
• [ x] This change does not include any external library/resources.
• [ x] This change does not include any unrelated scripts (e.g. bash and python scripts).
• [ x] I have enabled maintainer edits for this PR.

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[sonarcloud]

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[hugo-sid]

Thanks a lot for the fix @conradkun.

I don't remember how an extra space got in there.

I appreciate your contribution.